Method, apparatus and medium for wireless communication

Abstract

Methods, apparatuses, and media for wireless communication are described. The method includes a method for wireless communication comprising: receiving one or more control messages scheduling a set of repetitions of uplink transmissions, where frequency hopping is configured for the set of repetitions; transmitting a first plurality of consecutive repetitions of the set of repetitions at a first frequency according to the frequency hopping configured for the set of repetitions, where transmitting the first plurality of consecutive repetitions includes transmitting each of the first plurality of consecutive repetitions in a respective slot of a first set of consecutive slots; and transmitting a second plurality of consecutive repetitions of the set of repetitions according to the frequency hopping configured for the set of repetitions at a second frequency different from the first frequency and after transmitting the first plurality of consecutive repetitions, wherein transmitting the second plurality of consecutive repetitions includes transmitting each of the second plurality of consecutive repetitions in a respective slot of a second set of consecutive slots at the second frequency.

Description

[0001] This divisional application is a divisional application of the application with the filing date of December 17, 2021, application number 202180090048.4, and invention title "Method, Apparatus, and Medium for Wireless Communication".

[0002] Cross - Reference

[0003] This patent application claims the priority of the U.S. patent application Ser. No. 17 / 151,102, entitled "REFERENCE SIGNAL BUNDLING FOR UPLINK CHANNEL REPETITION", filed on Jan. 15, 2021 by Khoshnevisan et al., which is assigned to the assignee of the present application. Technical Field

[0004] The following relates to wireless communication, including reference signal bundling for uplink channel repetition. Background Art

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multi - access systems include fourth - generation (4G) systems (such as Long - Term Evolution (LTE) systems, LTE - Advanced (LTE - A) systems, or LTE - A Pro systems), and fifth - generation (5G) systems that may be referred to as New Radio (NR) systems. These systems may employ technologies such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing (DFT - S - OFDM). A wireless multi - access communication system may include one or more base stations or one or more network access nodes, and each base station or network access point supports the communication of multiple communication devices simultaneously, which may be otherwise referred to as user equipment (UE).

[0006] Wireless communication systems may support the repetition of various channels to improve communication reliability, among other benefits. For example, a user equipment (UE) may be configured to repeat uplink data or control channel transmissions to increase the likelihood of successful reception at a base station. Summary of the Invention

[0007] The described technology relates to improved methods, systems, devices, and apparatuses for supporting reference signal bundling for uplink channel repetition. Generally, the described technology provides a user equipment (UE) configured to demodulate reference signals (DMRS) bundling to receive first and second sets of repeated control messages scheduling uplink transmissions. The UE may determine a phase coherence configuration to be applied to DMRS transmissions corresponding to each set of repetitions. The phase coherence configuration may be determined at least in part based on the UE's phase coherence capabilities, and the phase coherence configuration may specify maintaining phase coherence for one or more of the first set of repetitions separated from one or more of the second set of repetitions. The UE may transmit the first set of repetitions and the first set of demodulation reference signals, and the second set of repetitions and the second set of demodulation reference signals, according to the phase coherence configuration. The first set of repetitions and the second set of repetitions may differ from each other in various transmission parameters, frequency hopping, or both.

[0008] A method for wireless communication at a user equipment (UE) is described. The method may include receiving one or more control messages scheduling a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission, determining a phase coherence configuration to be applied to the transmission of the first set of repetitions and the corresponding first set of demodulation reference signals, and the transmission of the second set of repetitions and the corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capabilities and specifying maintaining phase coherence for one or more of the first set of repetitions separated from one or more of the second set of repetitions, and transmitting the first set of repetitions and the first set of demodulation reference signals, and the second set of repetitions and the second set of demodulation reference signals, according to the phase coherence configuration.

[0009] An apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to receive one or more control messages that control a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission, determine a phase coherence configuration to be applied to the transmission of the first set of repetitions and the corresponding first set of demodulation reference signals, and the transmission of the second set of repetitions and the corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capabilities and specifying maintaining phase coherence for one or more of the first set of repetitions separated from one or more of the second set of repetitions, and transmit the first set of repetitions and the first set of demodulation reference signals, and the second set of repetitions and the second set of demodulation reference signals, according to the phase coherence configuration.

[0010] Another apparatus for wireless communication at a UE is described. The apparatus may include components for receiving one or more control messages that schedule a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission, components for determining a phase coherence configuration to be applied to the transmission of the first set of repetitions and the corresponding first set of demodulation reference signals and to the transmission of the second set of repetitions and the corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capability and specifying that phase coherence is to be maintained for one or more of the first set of repetitions that are separate from one or more of the second set of repetitions, and components for transmitting the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of demodulation reference signals in accordance with the phase coherence configuration.

[0011] A non-transitory computer-readable medium storing code for wireless communication at a UE is described. The code may include instructions executable by a processor to perform the following operations: receive one or more control messages that schedule a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission, determine a phase coherence configuration to be applied to the transmission of the first set of repetitions and the corresponding first set of demodulation reference signals and to the transmission of the second set of repetitions and the corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capability and specifying that phase coherence is to be maintained for one or more of the first set of repetitions that are separate from one or more of the second set of repetitions, and transmit the first set of repetitions and the first set of demodulation reference signals, and the second set of repetitions and the second set of demodulation reference signals, in accordance with the phase coherence configuration.

[0012] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for maintaining a first phase coherence for each demodulation reference signal transmission corresponding to the first set of repetitions and maintaining a second phase coherence for each demodulation reference signal transmission corresponding to the second set of repetitions in accordance with the phase coherence configuration.

[0013] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for receiving a control message indicating a mapping scheme, the UE may use the mapping scheme to transmit one or more of the first set of repetitions and one or more of the second set of repetitions, wherein the phase coherence configuration may be determined based on the mapping scheme.

[0014] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the mapping scheme may be one of a cyclic mapping scheme, a sequential mapping scheme, or a split-half mapping scheme.

[0015] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following: determining that a UE will be able to send a first set of repetitions and a second set of repetitions according to a cyclic mapping scheme such that one or more of the first set of repetitions and one or more of the second set of repetitions will be able to be sent in an alternating order, transmitting each demodulation reference signal transmission for the first set of repetitions without maintaining phase coherence according to a phase coherence configuration, and transmitting each demodulation reference signal transmission for the second set of repetitions without maintaining phase coherence according to a phase coherence configuration.

[0016] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for maintaining a first phase coherence for demodulation reference signal transmissions corresponding to consecutive first repetitions of the first set of repetitions and maintaining a second phase coherence for demodulation reference signal transmissions corresponding to consecutive second repetitions of the second set of repetitions according to a phase coherence configuration.

[0017] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for maintaining a first phase coherence across each consecutive group of demodulation reference signal transmissions corresponding to the first repetitions of the first set of repetitions and maintaining a second phase coherence across each consecutive group of cross-demodulation reference signal transmissions corresponding to the second repetitions of the second set of repetitions according to a phase coherence configuration.

[0018] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving one or more control messages may include operations, features, components, or instructions for receiving a control message that specifies that the UE will be able to use an ordered mapping scheme such that two first repetitions of the first set of repetitions can be sent consecutively and two second repetitions of the second set of repetitions can be sent consecutively.

[0019] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving one or more control messages may include operations, features, components, or instructions for receiving a control message that specifies that the UE will be able to use a split mapping such that the first set of repetitions will be able to be sent consecutively and the second set of repetitions will be able to be sent consecutively.

[0020] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving one or more control messages can include operations, features, components, or instructions for receiving a control message that indicates that a UE will be able to use a first set of transmission parameters to transmit a first set of repetitions and will be able to use a second set of transmission parameters to transmit a second set of repetitions, wherein the first set of repetitions and corresponding first set of demodulation reference signals can be transmitted according to the first set of transmission parameters and the second set of repetitions and corresponding second set of demodulation reference signals can be transmitted according to the second set of transmission parameters.

[0021] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the first set of transmission parameters and the second set of transmission parameters include one or more uplink beams, at least one uplink power control parameter, and precoding, and at least one value of the second set of transmission parameters can be different from the corresponding value of the first set of transmission parameters.

[0022] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein can further include operations, features, components, or instructions for receiving a control message that indicates that the UE will be able to use frequency hopping such that the UE will be able to transmit the first set of repetitions at a first frequency and the second set of repetitions at a second frequency, wherein the phase coherence configuration can be determined at least in part based on the indication that the UE will be able to use the frequency hopping.

[0023] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein can further include operations, features, components, or instructions for performing the following operations: determining that the UE will be able to transmit a first set of repetitions at a first frequency and a second set of repetitions at a second frequency, maintaining a first phase coherence for each demodulation reference signal transmission corresponding to the first set of repetitions at the first frequency according to the phase coherence configuration, and maintaining a second phase coherence for each demodulation reference signal transmission corresponding to the second set of repetitions at the second frequency according to the phase coherence configuration.

[0024] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein can further include operations, features, components, or instructions for performing the following operations: determining that the UE will be able to transmit a first set of repetitions at a first frequency and a second set of repetitions at a second frequency, and transmitting, according to the phase coherence configuration, each demodulation reference signal transmission corresponding to the first set of repetitions at the first frequency without maintaining phase coherence; and transmitting, according to the phase coherence configuration, each demodulation reference signal transmission corresponding to the second set of repetitions at the second frequency without maintaining phase coherence.

[0025] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following: determining that a UE will be able to transmit a first set of repetitions at a first frequency and a second set of repetitions at a second frequency, and maintaining a first phase coherence for demodulation reference signal transmissions corresponding to consecutive first repetitions of the first set of repetitions at the first frequency according to a phase coherence configuration; and maintaining a second phase coherence for demodulation reference signal transmissions corresponding to consecutive second repetitions of the second set of repetitions at the second frequency according to the phase coherence configuration.

[0026] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following: maintaining the first phase coherence for each consecutive set of first repetitions corresponding to the first set of repetitions at the first frequency across demodulation reference signal transmissions according to the phase coherence configuration; and maintaining the second phase coherence for each consecutive set of second repetitions corresponding to the second set of repetitions at the second frequency across demodulation reference signal transmissions according to the phase coherence configuration.

[0027] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving one or more control messages may include operations, features, components, or instructions for performing the following: receiving scheduling indications for a first set of repetitions and a second set of repetitions for scheduling physical uplink shared channel transmissions, and the repetitions will be able to be sent using a type A configuration or a type B configuration, where the type A configuration indicates that consecutive repetitions will be able to be sent in consecutive time slots, and the type B configuration indicates that consecutive repetitions can be sent continuously across one or more time slots.

[0028] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, receiving one or more control messages may include operations, features, components, or instructions for performing the following: receiving scheduling indications for a first set of repetitions and a second set of repetitions for scheduling physical uplink control channel transmissions, and the repetitions will be able to be sent using an inter-slot configuration or an intra-slot configuration, where the inter-slot configuration indicates that consecutive repetitions will be able to be sent in consecutive time slots and the intra-slot configuration indicates that consecutive repetitions will be able to be sent continuously across one or more time slots.

[0029] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following: transmitting, by the UE, an indication of the UE's capabilities for supporting maintaining phase coherence across non-consecutive repetitions, where the one or more control messages may be received at least in part based on the indication of the UE's capabilities.

[0030] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following: receiving a demodulation reference signal bundling configuration that may indicate a phase coherence configuration in which the UE may maintain phase coherence for uplink communication, wherein the phase coherence configuration may be determined based on receiving the demodulation reference signal bundling configuration.

[0031] A method for wireless communication at a base station is described. The method may include sending, to a UE, one or more control messages that determine a phase coherence configuration to be applied to transmissions of a first set of repetitions of an uplink transmission and corresponding first set of demodulation reference signals and transmissions of a second set of repetitions of the uplink transmission and corresponding second set of demodulation reference signals, according to a repetition configuration scheduling the first set of repetitions and the second set of repetitions of the uplink transmission, the phase coherence configuration being based on the phase coherence capabilities of the UE and specifying maintaining phase coherence for one or more of the first set of repetitions separate from one or more of the second set of repetitions, and receiving one or both of the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of modulation reference signals according to the phase coherence configuration.

[0032] An apparatus for wireless communication at a base station is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to send, to a UE, one or more control messages that determine a phase coherence configuration to be applied to transmissions of a first set of repetitions of an uplink transmission and corresponding first set of demodulation reference signals and transmissions of a second set of repetitions of the uplink transmission and corresponding second set of demodulation reference signals, according to a repetition configuration scheduling the first set of repetitions and the second set of repetitions of the uplink transmission, the phase coherence configuration being based on the phase coherence capabilities of the UE and specifying maintaining phase coherence for one or more of the first set of repetitions separate from one or more of the second set of repetitions, and receiving one or both of the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of demodulation reference signals according to the phase coherence configuration.

[0033] Another apparatus for wireless communication at a base station is described. The apparatus may include means for sending, to a UE, one or more control messages that schedule a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission according to a repetition configuration, means for determining a phase coherence configuration to be applied to the transmission of the first set of repetitions and a corresponding first set of demodulation reference signals by the UE and to the transmission of the second set of repetitions and a corresponding second set of demodulation reference signals, the phase coherence configuration being based on the phase coherence capability of the UE and specifying maintaining phase coherence for one or more of the first set of repetitions that are separate from one or more of the second set of repetitions, and means for combining one or both of the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of demodulation reference signals according to the phase coherence configuration.

[0034] A non-transitory computer-readable medium storing code for wireless communication at a base station is described. The code may include instructions executable by a processor to send, to a UE, one or more control messages that schedule a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission according to a repetition configuration, determine a phase coherence configuration to be applied to the transmission of the first set of repetitions and a corresponding first set of demodulation reference signals by the UE and to the transmission of the second set of repetitions and a corresponding second set of demodulation reference signals, the phase coherence configuration being based on the phase coherence capability of the UE and specifying maintaining phase coherence for one or more of the first set of repetitions that are separate from one or more of the second set of repetitions, and receive one or both of the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of demodulation reference signals.

[0035] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, means, or instructions for estimating a channel for uplink transmission by combining at least two received demodulation reference signals corresponding to the first set of repetitions or corresponding to the second set of repetitions according to the phase coherence configuration.

[0036] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, means, or instructions for combining at least two received demodulation reference signals corresponding to non-consecutive first transmissions of the first set of repetitions or non-consecutive second transmissions of the second set of repetitions.

[0037] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, means, or instructions for combining at least two received demodulation reference signals corresponding to consecutive first transmissions of the first set of repetitions or consecutive second transmissions of the second set of repetitions.

[0038] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending a control message that may indicate a mapping scheme, which the UE will use to send one or more of the first set of repetitions and one or more of the second set of repetitions, wherein the phase coherence configuration may be determined based on the mapping scheme.

[0039] In some examples of the methods, apparatuses, and non-transitory computer-readable media described herein, the mapping scheme may be one of a cyclic mapping scheme, a sequential mapping scheme, or a split-half mapping scheme.

[0040] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for sending an indication to the UE that the UE will use a first frequency to send the first set of repetitions and a second frequency to send the second set of repetitions, wherein the phase coherence configuration may be determined based on the sent indication.

[0041] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following operations: sending a scheduling indication for scheduling the first set of repetitions and the second set of repetitions of a physical uplink shared channel transmission to the UE, and the repetitions will be sent using a type A configuration or a type B configuration, wherein the type A configuration indicates that consecutive repetitions will be sent in consecutive time slots, and the type B configuration indicates that consecutive repetitions can be sent continuously across one or more time slots.

[0042] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following operations: sending a scheduling indication for scheduling the first set of repetitions and the second set of repetitions of a physical uplink control channel transmission to the UE, and the repetitions will be sent using an inter-slot configuration or an intra-slot configuration, wherein the inter-slot configuration indicates that consecutive repetitions will be sent in consecutive time slots, and the intra-slot configuration indicates that consecutive repetitions will be sent continuously across one or more time slots.

[0043] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for performing the following operations: receiving an indication of the UE's ability to support phase coherence across non-consecutive repetitions from the UE, wherein the phase coherence configuration may be determined based on the UE's ability.

[0044] Some examples of the methods, apparatuses, and non-transitory computer-readable media described herein may also include operations, features, components, or instructions for: sending to a UE a demodulation reference signal bundle configuration that may indicate that the UE may maintain phase coherence for uplink communication, where the phase coherence configuration may be determined based on the sent demodulation reference signal bundle configuration. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 Illustrates an example of a wireless communication system supporting reference signal bundles for uplink channel repetition in accordance with aspects of the present disclosure.

[0046] Figure 2 Illustrates an example of a wireless communication system supporting reference signal bundles for uplink channel repetition in accordance with aspects of the present disclosure.

[0047] Figure 3 Illustrates an example of a repetition mapping pattern for reference signal bundles for uplink channel repetition in accordance with aspects of the present disclosure.

[0048] Figure 4 Illustrates an example of a frequency hopping repetition mapping pattern for reference signal bundles for uplink channel repetition in accordance with aspects of the present disclosure.

[0049] Figure 5 Illustrates an example of a process flow diagram depicting reference signal bundles for uplink channel repetition in accordance with aspects of the present disclosure.

[0050] Figure 6 and Figure 7 Shows a block diagram of an apparatus supporting reference signal bundles for uplink channel repetition in accordance with aspects of the present disclosure.

[0051] Figure 8 Shows a block diagram of a communication manager supporting reference signal bundles for uplink channel repetition in accordance with aspects of the present disclosure.

[0052] Figure 9 Shows a schematic diagram of a system including an apparatus supporting reference signal bundles for uplink channel repetition in accordance with aspects of the present disclosure.

[0053] Figure 10 and Figure 11 Shows a block diagram of an apparatus supporting reference signal bundles for uplink channel repetition in accordance with aspects of the present disclosure.

[0054] Figure 12 Shows a block diagram of a communication manager supporting reference signal bundles for uplink channel repetition in accordance with aspects of the present disclosure.

[0055] Figure 13 FIG. 1 shows a schematic diagram of a system including an apparatus supporting reference signal bundling for uplink channel repetition in accordance with aspects of the present disclosure.

[0056] Figures 14 to 17 FIG. 2 shows a flowchart illustrating a method supporting reference signal bundling for uplink channel repetition in accordance with aspects of the present disclosure. DETAILED DESCRIPTION

[0057] A wireless communication system may support bundling of reference signals such as demodulation reference signals (DMRS) to support improved channel estimation and communication performance. When two or more reference signals are bundled, the reference signals may be transmitted such that phase coherency is maintained for each reference signal transmission. Maintaining phase coherency may support a receiving device in combining the signals. In the case of DMRS bundling, a receiving device (e.g., a base station) may be able to jointly or coherently estimate the channel based on the combined signals.

[0058] The wireless communication system may also support channel repetition for various channels to improve communication reliability, among other benefits. For example, a user equipment (UE) may be configured to repeat uplink data or control channel transmissions to increase the likelihood of successful reception at the base station. Various repetition configurations may be supported for various channels. In some cases, the channel repetition may be configured into two different sets, where each set will be transmitted according to a corresponding set of transmission parameters. In some cases, the transmission parameters correspond to transmit beams, and thus, each set of repetitions may be transmitted using a different transmit beam. Using different transmit beams may support an increased likelihood of reception and decoding of the channel at a receiving device (such as a base station) having multiple transmit-receive points (TRPs). In other cases, each set of repetitions may be associated with a different hopping from a hopping pattern.

[0059] The techniques described herein support DMRS bundling configurations for uplink channel repetition. If a UE is scheduled or configured to perform two sets of uplink channel repetitions, such as physical uplink shared channel (PUSCH) or physical uplink control channel (PUCCH) repetitions, the UE may determine a phase coherency configuration to apply to the DMRS corresponding to the uplink channel repetition. The UE may determine to maintain phase coherency for each set of repetitions such that the DMRS transmissions corresponding to each respective set may be combined at the base station for channel estimation. If the UE is unable to maintain phase coherency for non-consecutive repetitions (e.g., the UE does not have the capability), the UE may determine to maintain phase coherency for consecutive sets of repetitions for each group, if the pattern or mapping supports consecutive repetitions within a group.

[0060] These techniques can be applied to various repetition configurations for PUSCH or PUCCH repetition. In the case of PUSCH repetition, these techniques can be applied to type A repetition (repetition in different time slots) or type B repetition (consecutive repetition in one or more time slots). In the case of PUCCH repetition, these techniques can be applied to inter-slot repetition or intra-slot repetition. A UE configured with frequency hopping for channel repetition can perform similar techniques for DMRS bundling for changing transmission parameters as described herein.

[0061] Aspects of the present disclosure are initially described in the context of a wireless communication system. Further aspects of the present disclosure are described with respect to a wireless communication system that shows diagrams of channel repetition, repetition patterns, and process flowcharts. Aspects of the present disclosure are further illustrated and described with reference to apparatus diagrams, system diagrams, and flowcharts related to reference signal bundling for uplink channel repetition.

[0062] Figure 1 An example of a wireless communication system 100 that supports reference signal bundling for uplink channel repetition in accordance with aspects of the present disclosure is illustrated. The wireless communication system 100 can include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 can be a Long Term Evolution (LTE) network, an Advanced LTE (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 can support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0063] The base stations 105 can be dispersed throughout a geographic area to form the wireless communication system 100 and can be devices of different forms or having different capabilities. The base stations 105 and the UEs 115 can communicate wirelessly via one or more communication links 125. Each base station 105 can provide a coverage area 110 over which the UEs 115 and the base stations 105 can establish one or more communication links 125. The coverage area 110 can be an example of a geographic area over which the base stations 105 and the UEs 115 can support signal communication according to one or more radio access technologies.

[0064] The UEs 115 can be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 can be stationary or mobile, or both at different times. The UEs 115 can be devices of different forms or having different capabilities. In Figure 1Some example UEs 115 are illustrated. The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network devices (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network devices), as Figure 1 shown.

[0065] The base stations 105 may communicate with the core network 130, or with each other, or both. For example, the base stations 105 may interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or other interfaces). The base stations 105 may communicate directly (e.g., directly between base stations 105) or indirectly (e.g., via the core network 130) or both with each other via backhaul links 120 (e.g., via X2, Xn, or other interfaces). In some examples, the backhaul links 120 may be or include one or more wireless links.

[0066] One or more of the base stations 105 described herein may include or may be referred to by those of ordinary skill in the art as a base station transceiver, radio base station, access point, radio transceiver, NodeB, eNodeB (eNB), next-generation NodeB, or giga NodeB (any of which may be referred to as a gNB), home NodeB, home eNodeB, or other suitable terms.

[0067] The UE 115 may include or may be referred to as a mobile device, wireless device, remote device, handheld device, or subscriber device, or some other suitable term, where a "device" may also be referred to as a unit, station, terminal, or client, etc. The UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, the UE 115 may include or be referred to as a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or machine type communication (MTC) device, etc., which may be implemented in various objects, such as appliances, or vehicles, meters, etc.

[0068] The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115 that may sometimes act as relays, as well as base stations 105 and network devices including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, and other examples, as Figure 1 shown.

[0069] UE 115 and base station 105 may wirelessly communicate with each other via one or more communication links 125 on one or more carriers. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication link 125. For example, a carrier for communication link 125 may include a portion (e.g., bandwidth part (BWP)) of a radio frequency spectrum band operating according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operation, user data, or other signaling. The wireless communication system 100 may use carrier aggregation or multi-carrier operation to support communication with UE 115. According to a carrier aggregation configuration, UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers. Carrier aggregation may be used with frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0070] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling for coordinating the operation of other carriers. A carrier may be associated with a frequency channel (e.g., evolved universal mobile telecommunications system terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN)) and may be positioned according to a channel raster for discovery by UE 115. A carrier may operate in stand-alone mode, where initial acquisition and connection may be performed by UE 115 via the carrier, or a carrier may operate in non-stand-alone mode, where a different carrier (e.g., the same or different radio access technology) is used to anchor the connection.

[0071] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from UE 115 to base station 105, or a downlink transmission from base station 105 to UE 115. A carrier may carry downlink or uplink communication (e.g., in FDD mode) or may be configured to carry both downlink and uplink communication (e.g., in TDD mode).

[0072] A carrier can be associated with a specific bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth can be referred to as the "system bandwidth" of the carrier or the wireless communication system 100. For example, the carrier bandwidth can be one of multiple determined bandwidths of a carrier for a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)). Devices of the wireless communication system 100 (e.g., the base station 105, the UE 115, or both) can have a hardware configuration that supports communication through a specific carrier bandwidth or can be configured to support communication through one of a set of carrier bandwidths. In some examples, the wireless communication system 100 can include the base station 105 or the UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 can be configured to operate on a portion (e.g., a subband, a BWP) or all of the carrier bandwidth.

[0073] The signal waveform transmitted through a carrier can be composed of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system adopting MCM techniques, a resource element can be composed of a symbol period (e.g., the duration of a modulated symbol) and a subcarrier, where the symbol period and the subcarrier spacing are inversely correlated. The number of bits carried by each resource element can depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both). Therefore, the more resource elements the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate of the UE 115. Wireless communication resources can refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers can further increase the data rate or data integrity of communication with the UE 115.

[0074] One or more numerologies of a carrier can be supported, where a numerology can include a subcarrier spacing ( ) and a cyclic prefix. A carrier can be divided into one or more BWPs with the same or different numerologies. In some examples, the UE 115 can be configured with multiple BWPs. In some examples, a single BWP of a carrier can be active at a given time and communication for the UE 115 can be restricted to one or more active BWPs.

[0075] The time interval of the base station 105 or the UE 115 can be expressed as a multiple of a basic time unit, which can, for example, refer to the sampling period of a second, where can represent the maximum supported subcarrier spacing, and may represent the maximum supported Discrete Fourier Transform (DFT) size. The time intervals of the communication resources may be organized according to each radio frame having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a System Frame Number (SFN) (e.g., ranging from 0 to 1023).

[0076] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a plurality of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a plurality of symbol periods (e.g., depending on the length of the cyclic prefix appended to each symbol period). In some wireless communication systems 100, a time slot may be further divided into a plurality of mini-slots containing one or more symbols. Except for the cyclic prefix, each symbol period may contain one or more (e.g., number of) sampling periods. The duration of the symbol period may depend on the subcarrier spacing or the operating frequency band.

[0077] A subframe, time slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a Transmission Time Interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in the TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs)).

[0078] Physical channels can be multiplexed on a carrier according to various techniques. The physical control channel and the physical data channel can be multiplexed on a downlink carrier using, for example, one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. The control region of the physical control channel (e.g., control resource set (CORESET)) can be defined by a plurality of symbol periods and can extend across the system bandwidth of the carrier or a subset of the system bandwidth. One or more control regions (e.g., CORESET) can be configured for a group of UEs 115. For example, one or more UEs 115 can monitor or search a control region for control information according to one or more search space sets, and each search space set can include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. The aggregation level of a control channel candidate can refer to the number of control channel resources (e.g., control channel elements (CCE)) associated with the encoded information of a control information format having a given payload size. The search space set can include a common search space set configured to send control information to a plurality of UEs 115 and a UE-specific search space set for sending control information to a specific UE 115.

[0079] Each base station 105 can provide communication coverage via one or more cells, such as macro cells, small cells, hotspots, or other types of cells or any combination thereof. The term "cell" can refer to a logical communication entity for communicating with the base station 105 (e.g., via a carrier), and can be associated with an identifier (e.g., physical cell identifier (PCID), virtual cell identifier (VCID), or others) for distinguishing adjacent cells. In some examples, a cell can also refer to a geographic coverage area 110 or a portion of the geographic coverage area 110 (e.g., a sector) on which the logical communication entity operates. The ranges of these cells can vary from a smaller area (e.g., a structure, a subset of a structure) to a larger area, depending on various factors such as the capabilities of the base station 105. For example, a cell can be or include a building, a subset of a building, or an external space between or overlapping with the geographic coverage area 110, and so on.

[0080] Macro cells typically cover a relatively large geographical area (e.g., with a radius of several kilometers) and can allow unrestricted access for UEs 115 having a service subscription with the network provider that supports the macro cell. Compared to macro cells, small cells can be associated with lower power base stations 105, and small cells can operate in the same or different (e.g., licensed, unlicensed) frequency bands as macro cells. Small cells can provide unrestricted access to UEs 115 having a service subscription with the network provider, or can provide restricted access to UEs 115 associated with the small cell (e.g., UEs 115 in a closed subscriber group (CSG), UEs 115 associated with users in a home or office). A base station 105 can support one or more cells and can also support communication on one or more cells using one or more component carriers.

[0081] In some examples, a carrier can support multiple cells, and different cells can be configured according to different protocol types (e.g., MTC, narrowband IoT (NB-IoT), enhanced mobile broadband (eMBB)), which can provide access for different types of devices.

[0082] In some examples, the base station 105 can be movable and thus provide communication coverage for a mobile geographical coverage area 110. In some examples, different geographical coverage areas 110 associated with different technologies can overlap, but different geographical coverage areas 110 can be supported by the same base station 105. In other examples, overlapping geographical coverage areas 110 associated with different technologies can be supported by different base stations 105. The wireless communication system 100 can include, for example, a heterogeneous network where different types of base stations 105 provide coverage for various geographical coverage areas 110 using the same or different radio access technologies.

[0083] The wireless communication system 100 can support synchronous or asynchronous operation. For synchronous operation, the base stations 105 can have similar frame timings, and transmissions from different base stations 105 can be approximately aligned in time. For asynchronous operation, the base stations 105 can have different frame timings, and in some examples, transmissions from different base stations 105 can be misaligned in time. The techniques described herein can be used for synchronous or asynchronous operation.

[0084] Some UEs 115, such as MTC or IoT devices, can be low-cost or low-complexity devices and can provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with the base station 105 without human intervention. In some examples, M2M communication or MTC can include communication from devices integrated with sensors or meters to measure or capture information and relay such information to a central server or application that uses the information or presents the information to a person interacting with the application. Some UEs 115 can be designed to collect information or implement automated behavior of machines or other devices. Examples of applications of MTC devices include smart metering, inventory monitoring, water level monitoring, device monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.

[0085] Some UEs 115 can be configured to operate in power-saving modes, such as half-duplex communication (e.g., a mode that supports one-way communication via transmission or reception but not both simultaneously). In some examples, half-duplex communication can be performed at a reduced peak rate. Other power-saving techniques for UEs 115 include entering a power-saving deep sleep mode when not participating in active communication, operating on a limited bandwidth (e.g., according to narrowband communication), or a combination of these techniques. For example, some UEs 115 can be configured to operate using a narrowband protocol type associated with a defined portion or range within a carrier, within a guard band of the carrier, or outside the carrier (e.g., a set of subcarriers or resource blocks (RBs)).

[0086] The wireless communication system 100 can be configured to support ultra-reliable communication or low-latency communication or various combinations thereof. For example, the wireless communication system 100 can be configured to support ultra-reliable low-latency communication (URLLC) or mission-critical communication. UEs 115 can be designed to support ultra-reliable, low-latency, or critical functions (e.g., mission-critical functions). Ultra-reliable communication can include private communication or group communication and can be supported by one or more mission-critical services, such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions can include prioritization of services, and mission-critical services can be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, mission-critical, and ultra-reliable low-latency may be used interchangeably herein.

[0087] In some examples, UE 115 may also be able to communicate directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., using peer-to-peer (P2P) or D2D protocols). One or more UEs 115 utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UEs 115 in this group may be outside the geographic coverage area 110 of base station 105 or otherwise unable to receive transmissions from base station 105. In some examples, a group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some examples, base station 105 facilitates resource scheduling for D2D communication. In other cases, D2D communication is performed between UEs 115 without the participation of base station 105.

[0088] In some systems, D2D communication link 135 may be an example of a communication channel between vehicles (e.g., UE 115), such as a sidelink communication channel. In some examples, vehicles may communicate using vehicle-to-everything (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination thereof. Vehicles may emit information related to traffic conditions, signal scheduling, weather, safety, emergencies, or any other information related to the V2X system. In some examples, vehicles in a V2X system may communicate with roadside infrastructure (such as roadside units) or communicate with the network via one or more network nodes (e.g., base station 105) using vehicle-to-network (V2N) communication, or both.

[0089] Core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)). The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management for UE 115 served by base station 105 associated with core network 130. User IP packets may be transmitted through the user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to the IP services 150 of one or more network operators. IP services 150 may include access to the Internet, an intranet, an IP multimedia subsystem (IMS), or packet-switched streaming services.

[0090] Some network devices, such as base station 105, may include subcomponents, such as access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with UE 115 via one or more other access network transport entities 145, which may be referred to as radio heads, intelligent radio heads, or transmit / receive points (TRPs). Each access network transport entity 145 may include one or more antenna panels. In some configurations, various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or combined into a single network device (e.g., base station 105).

[0091] Wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). Generally, the region from 300 MHz to 3 GHz is referred to as the ultra-high frequency (UHF) region or the decimeter band, as the wavelength ranges from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features, but these waves may penetrate structures sufficiently to allow a macrocell to serve a UE 115 located indoors. Compared to transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz, UHF wave transmissions may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers).

[0092] Wireless communication system 100 may also operate in the super-high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz (also referred to as the centimeter band), or in the extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also referred to as the millimeter band). In some examples, wireless communication system 100 may support millimeter wave (mmW) communication between UE 115 and base station 105, and the EHF antennas of the corresponding devices may be smaller and closer spaced than UHF antennas. In some examples, this may facilitate the use of antenna arrays within the devices. However, compared to SHF or UHF transmissions, EHF transmissions may be subject to even greater atmospheric attenuation and shorter distances. The techniques disclosed herein may be used across transmissions using one or more different frequency regions, and the specified use of frequency bands across these frequency regions may vary by country or regulatory authority.

[0093] The wireless communication system 100 can use licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 can employ Licensed-Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz Industrial, Scientific, and Medical (ISM) band. When operating in an unlicensed radio spectrum band, devices such as base station 105 and UE 115 can employ carrier sensing for collision detection and avoidance. In some examples, operation in the unlicensed band can be based on a carrier aggregation configuration that combines a component carrier operating in a licensed band (e.g., LAA). Operation in the unlicensed spectrum can include downlink transmission, uplink transmission, P2P transmission, or D2D transmission, among other examples.

[0094] Base station 105 or UE 115 can be equipped with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of base station 105 or UE 115 can be located within one or more antenna arrays or antenna panels, which can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays can be co-located at an antenna assembly such as an antenna tower. In some examples, the antennas or antenna arrays associated with base station 105 can be located at different geographical locations. Base station 105 can have an antenna array that has multiple rows and columns of antenna ports, and base station 105 can use these antenna ports to support beamforming for communication with UE 115. Similarly, UE 115 can have one or more antenna arrays, which can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel can support radio frequency beamforming for signals transmitted via the antenna ports.

[0095] Base station 105 or UE 115 can use MIMO communication to exploit multipath signal propagation and increase spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such a technique can be referred to as spatial multiplexing. The multiple signals can, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Similarly, the multiple signals can be received by the receiving device via different antennas or different combinations of antennas. Each of the multiple signals can be referred to as a separate spatial stream and can carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). The different spatial layers can be associated with different antenna ports for channel measurement and reporting. MIMO techniques include single-user MIMO (SU-MIMO), where multiple spatial layers are transmitted to the same receiving device, and multi-user MIMO (MU-MIMO), where multiple spatial layers are transmitted to multiple devices.

[0096] Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that can be used at a transmitting device or a receiving device (e.g., base station 105, UE 115) to shape or manipulate an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming can be achieved by combining signals transmitted via the antenna elements of an antenna array such that some signals propagating in a particular direction relative to the antenna array undergo constructive interference while other signals undergo destructive interference. The adjustment of the signals transmitted via the antenna elements can include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to the signals carried via the antenna elements associated with the device. The adjustment associated with each antenna element can be defined by a set of beamforming weights associated with a particular direction (e.g., with respect to the antenna array of the transmitting device or the receiving device, or with respect to some other direction).

[0097] The base station 105 or the UE 115 can use beam scanning techniques as part of the beamforming operation. For example, the base station 105 can use multiple antennas or antenna arrays (e.g., antenna panels) to perform beamforming operations for directional communication with the UE 115. Some signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) can be transmitted by the base station 105 multiple times in different directions. For example, the base station 105 can transmit signals according to different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions can be used to identify (e.g., by a transmitting device such as the base station 105, or by a receiving device such as the UE 115) the beam direction for later transmission or reception by the base station 105.

[0098] Some signals, such as data signals associated with a particular receiving device, can be transmitted by the base station 105 in a single beam direction (e.g., the direction associated with a receiving device such as the UE 115). In some examples, the beam direction associated with a transmission along a single beam direction can be determined based on signals transmitted in one or more beam directions. For example, the UE 115 can receive one or more signals transmitted by the base station 105 in different directions and can report to the base station 105 an indication of the signal that the UE 115 receives with the highest signal quality or other acceptable signal quality.

[0099] In some examples, transmissions performed by a device (e.g., base station 105 or UE 115) can be carried out using multiple beam directions, and the device can use a combination of digital precoding or radio frequency beamforming to generate a combined beam for transmission (e.g., from base station 105 to UE 115). UE 115 can report feedback indicating precoding weights for one or more beam directions, and the feedback can correspond to a configured number of beams across the system bandwidth or one or more subbands. Base station 105 can transmit reference signals (e.g., cell-specific reference signal (CRS), channel state information reference signal (CSI-RS)), which can be precoded or not precoded. UE 115 can provide feedback for beam selection, which can be a precoding matrix indicator (PMI) or codebook-based feedback (e.g., multi-panel type codebook, linear combination type codebook, port selection type codebook). Although the techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 can employ similar techniques to transmit signals multiple times in different directions (e.g., for identifying beam directions for subsequent transmission or reception by UE 115) or to transmit signals in a single direction (e.g., for sending data to a receiving device).

[0100] A receiving device (e.g., UE 115) can attempt multiple receive configurations (e.g., directional listening) when receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105. For example, the receiving device can attempt multiple receive directions by receiving via different antenna subarrays, by processing received signals according to different antenna subarrays, by receiving according to different sets of receive beamforming weights (e.g., different directional listening weight sets) applied to signals received at multiple antenna elements of an antenna array, or by processing received signals according to different sets of receive beamforming weights applied to signals received at multiple antenna elements of an antenna array, according to different receive configurations or receive directions, any of which can be referred to as "listening". In some examples, the receiving device can use a single receive configuration to receive along a single beam direction (e.g., when receiving a data signal). The single receive configuration can be aligned in a beam direction determined based on listening according to different receive configuration directions (e.g., a beam direction determined to have the highest signal strength, the highest signal-to-noise ratio (SNR), or other acceptable signal quality based on listening according to multiple beam directions).

[0101] The wireless communication system 100 can be a packet-based network operating according to a layered protocol stack. In the user plane, the communication of the bearer layer or the Packet Data Convergence Protocol (PDCP) layer can be IP-based. The Radio Link Control (RLC) layer can perform packet segmentation and reassembly for communication over logical channels. The Medium Access Control (MAC) layer can perform priority handling and multiplexing of logical channels to transport channels. The MAC layer can also use error detection techniques, error correction techniques, or both to support retransmissions at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer can provide the establishment, configuration, and maintenance of the RRC connection between the UE 115 and the base station 105 or the core network 130 that supports the radio bearers for user plane data. At the physical layer, the transport channels can be mapped to physical channels.

[0102] The UE 115 and the base station 105 can support retransmissions of data to increase the likelihood of successful data reception. Hybrid Automatic Repeat reQuest (HARQ) feedback is a technique for increasing the likelihood of correctly receiving data over the communication link 125. HARQ can include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), Forward Error Correction (FEC), and retransmission (e.g., Automatic Repeat reQuest (ARQ)). HARQ can improve the throughput of the MAC layer under poor radio conditions (e.g., low signal-to-noise ratio conditions). In some examples, the device can support simultaneous slot HARQ feedback, where the device can provide HARQ feedback for data received in previous symbols in a particular slot during that slot. In other cases, the device can provide HARQ feedback in a subsequent slot or according to some other time interval.

[0103] The wireless communication system 100 can support bundling of reference signals by the UE 115 and / or the base station 105 to support improved channel estimation and communication performance. When two or more reference signals are bundled, the reference signals can be transmitted by the base station 105 or the UE 115 such that phase coherence is maintained for each reference signal transmission. Due to the phase coherence, the receiving device (e.g., the base station 105 or the UE 115) that receives the bundled reference signals can be able to combine the signals, which can support joint / coherent channel estimation. The wireless communication system 100 can also support channel transmission repetition to improve communication reliability. For example, the UE 115 can be configured to repeat PUSCH or PUCCH transmissions such that the base station 105 is more likely to receive / decoder the transmission. In some cases, the channel repetition can be configured into two or more groups, where each group will be transmitted according to a corresponding set of transmission parameters. For example, each group can be transmitted using a different beam to increase the likelihood of successful reception and decoding at the base station 105 configured with multiple antenna panels or TRPs.

[0104] According to the techniques described herein, DMRS bundling can be configured for channel repetition with one or more sets. For example, if UE 115 is scheduled for two sets of uplink channel repetition (e.g., PUSCH or PUCCH repetition), then UE 115 can also be configured to bundle DMRS transmissions. In such a case, UE 115 can determine to maintain phase coherence for each DMRS transmission corresponding to the respective set. Thus, the base station 105 that receives the bundled DMRS corresponding to one or both sets can jointly estimate the channel. However, in some examples, UE 115 may not be able to maintain phase coherence on non - consecutive or non - adjacent transmissions. In such a case, UE 115 can determine to maintain phase coherence for adjacent or consecutive repetitions within a set, provided that the repetition pattern supports adjacent or consecutive repetition. If the repetition mapping is sequential, which means UE 115 will alternate between repetitions of each set and UE 115 cannot maintain phase coherence for non - consecutive repetitions, then UE 115 can send each DMRS without maintaining phase coherence.

[0105] As described in further detail herein, DMRS bundling techniques can be applicable to various types of PUSCH or PUCCH repetition performed by UE 115. In the case of PUSCH repetition, these techniques can be applicable to type A repetition (repetition in different time slots) or type B repetition (consecutive repetition in one or more time slots). In the case of PUCCH repetition, these techniques can similarly be applicable to inter - slot repetition or intra - slot repetition. In some cases, the base station 105 can configure UE 115 to perform frequency hopping for channel repetition, and UE 115 can perform similar techniques for DMRS bundling.

[0106] Figure 2 FIG. illustrates an example of a wireless communication system 200 that supports reference signal bundling for uplink channel repetition in accordance with aspects of the present disclosure. The wireless communication system 200 can implement aspects of the wireless communication system 100 and includes a base station 105 - a and a UE 115 - a, which can be examples of the corresponding devices described with respect to Figure 1 The wireless communication system 200 can support DMRS bundling and uplink channel repetition as described herein. Figure 2 FIG. illustrates bundled DMRS 225 corresponding to PUSCH 220 repetition, but it should be understood that similar techniques can be applicable to PUCCH repetition as described herein.

[0107] The wireless communication system 200 may support PUSCH or PUCCH DMRS bundling. When PUSCH or PUCCH DMRS 225 is bundled, the UE 115-a may maintain phase coherence for each DMRS transmission. The base station 105-a may receive the bundled DMRS and use one or more of the bundled DMRS to jointly / coherently estimate the channel, which may improve the channel estimation performance. That is, the base station 105-a may combine the bundled DMRS 225 for channel estimation.

[0108] PUSCH phase discontinuity may occur based on different resource allocations, different transmit powers, different uplink beams (e.g., in FR2), and discontinuous resource allocations for different PUSCH symbols. For example, if the timing gap between PUSCH symbols is greater than a threshold gap, other uplink channels or signals (e.g., PUCCH, sounding reference signal (SRS)) or downlink channels or signals (e.g., physical downlink control channel (PDCCH)), physical downlink shared channel (PDSCH), synchronization signal block (SSB), channel state information reference signal (CSI-RS)) may be transmitted during the gap, which may result in phase discontinuity.

[0109] PUSCH 220 repetition may have two different configurations (e.g., indicated via control message 205): type A and type B. For type A repetition 220, in each time slot, the same symbols (e.g., the same starting symbol and the same length) may be used for PUSCH repetition 220. The number of repetitions K may be semi-statically configured (e.g., via RRC messaging) or dynamically indicated in the time domain resource allocation (TDRA) field in the downlink control information. For RRC configuration, if the UE 115-a is configured with the PUSCH-AggregationFactor parameter, the number of repetitions K may be equal to the PUSCH-AggregationFactor value. For dynamic indication, if the numberofrepetitions parameter exists in the TDRA table, the number of repetitions K may be equal to the numberofrepetitions indicated by the DCI (pointing to the TDRA row). As Figure 1 shown, type A repetition includes repetitions 230-a, 230-b, 230-c, and 230-d (e.g., K = 4 repetitions). Each repetition 230 may include a PUSCH 220 with a corresponding DMRS 225.

[0110] Type B repetitions may include multiple "nominal" repetitions across one or more consecutive time slots. The number of nominal repetitions may be indicated in the downlink control information. For example, numberofrepetitions may be configured for each row of the TDRA table, and may be dynamically indicated by the downlink control information by pointing to the TDRA row. Each nominal repetition may have the same length. For example, in repetition configuration 235-a, each of the two repetitions (e.g., K = 2) is four symbols. In some cases, due to the following reasons, the nominal repetitions are divided into multiple actual repetitions: (1) the repetition crosses a time slot boundary, or (2) one or more symbols of the nominal repetition are identified as invalid, where the nominal repetition is divided into multiple actual repetitions after removing the invalid symbols. Each actual repetition may have an associated DMRS 225, and the DMRS position may be based on the actual repetition. For repetition configuration 235-b, there are four repetitions, each configured with four symbols. The nominal repetition 230-g falls on a time slot boundary and is thus divided into two different actual repetitions. Each of the actual repetitions on either side of the time slot boundary may have a corresponding DMRS 225. For repetition configuration 235-c, there is one nominal repetition 230-h with fourteen symbols. The nominal repetition 230-h crosses a time slot boundary and is thus divided into two actual repetitions, each with a corresponding DMRS 225.

[0111] If different PUSCH repetitions are intended to be received at different TRPs, panels, or antennas at base station 105-a, it may be inefficient to use the same beam (or the same transmission parameters). In some scenarios, to improve the reliability and robustness of PUSCH transmission, the PUSCH repetitions are configured into two groups, where each group will be transmitted according to a corresponding set of transmission parameters. In a multi-TRP scenario or other scenarios, different groups can improve diversity. For example, if one link is blocked, another repetition via another link may be decoded by a different TRP or antenna panel. Thus, a set of transmission parameters may include uplink beam (e.g., spatial relation information), power control parameters, precoder parameters (TPMI), etc. Thus, the two groups of repetitions may correspond to two different SRS resource sets. The downlink control information may indicate two beams, two sets of power control parameters, etc. by indicating one or more SRS resources within each of the two SRS resource sets.

[0112] To apply parameter sets, one or more mapping patterns can be configured via a control message 205 (e.g., RRC messaging). For example, the control message 205 can indicate that UE 115-a is to use a cyclic mapping pattern for two sets. For the cyclic mapping pattern, the first set and the second set of transmission parameters (e.g., the first beam and the second beam) will be applied to the first PUSCH repetition and the second PUSCH repetition respectively, and the pattern can be repeated for the remaining PUSCH repetitions. In another example, the control message 205 can indicate that UE 115-a is to use a sequential mapping pattern, which means that the first set of parameters (e.g., the first beam) is to be applied to the first PUSCH repetition and the second PUSCH repetition, and the second set of transmission parameters (e.g., the second beam) will be applied to the third PUSCH repetition and the fourth PUSCH repetition. For the remaining PUSCH repetitions, the pattern can continue. Another type of mapping pattern can be a half-half mapping pattern, where the first set of parameters (e.g., the first beam) will be applied to the first half of the PUSCH repetition, and the second set of transmission parameters (e.g., the second beam) will be applied to the second half of the PUSCH repetition. These repetition patterns are further illustrated and described in Figure 3 Further illustration and description.

[0113] These patterns and configurations can be similarly applied to PUCCH repetitions. Up to two spatial relation information configurations can be activated per PUCCH resource via a MAC-CE (e.g., control message 205). PUCCH repetitions can be configured into two sets such that each set uses a corresponding uplink beam (e.g., spatial relation information) and power control parameters for transmission. The mapping patterns described herein for PUSCH repetitions can be applied to PUCCH repetitions. Additionally, the repetitions for PUCCH can have one of two configurations: inter-slot repetition and intra-slot repetition. For inter-slot repetition, one PUCCH resource carries uplink control information, and the same PUCCH resource in one or more additional slots can carry a repetition of the uplink control information. For intra-slot repetition, one PUCCH resource can carry uplink control information, and the same PUCCH resource in one or more additional sub-slots within a slot carries a repetition of the uplink control information.

[0114] According to the techniques described herein, if UE 115-a is configured with PUSCH or PUCCH DMRS 225 bundling and receives a control message scheduling two sets of repetitions of PUSCH / PUCCH with two sets of transmission parameters associated therewith, the DMRS 225 belonging to the same set are bundled (e.g., transmitted while maintaining phase coherence between transmissions). More specifically, UE 115-a maintains phase coherence for the repeated DMRS associated with the same set of transmission parameters. In this way, the base station 105-a with one or more TRPs can perform joint / coherent channel estimation across the repetitions belonging to the same set. This technique is applicable to both type A and type B PUSCH repetitions as well as inter-slot or intra-slot PUCCH repetitions.

[0115] In some examples, UE 115-a may not be able to maintain phase coherence across non-consecutive repetitions. In such cases, DMRS bundling can further depend on the mapping pattern of the repetitions in the first and second sets. For the cyclic mapping pattern, since there may not be consecutive repetitions of the same set, UE 115-a may not be able to bundle DMRS 225 transmissions. For the sequential mapping pattern, DMRS 225 transmissions can be bundled across two consecutive repetitions belonging to the same set. For the half-and-half mapping pattern, DMRS 225 transmissions can be bundled across each repetition belonging to the same set. When UE 115-a cannot support phase coherence across non-consecutive repetitions of the same set, this technique can maximize the number of repetitions of bundled DMRS 225 transmissions.

[0116] When UE 115-a is configured with a frequency hopping configuration for PUSCH or PUCCH repetitions, these techniques can be similarly applied. In such cases, UE 115-a can be configured to transmit the first set of repetitions at a first frequency and the second set of repetitions at a second frequency. If UE 115-a can maintain phase coherence across non-consecutive receptions of the same set, UE 115-a can maintain the corresponding phase coherence of DMRS 225 transmissions at each frequency. In some cases, UE 115-a is configured to alternate between frequencies in a cyclic pattern. In such cases, if UE 115-a cannot maintain phase coherence for non-consecutive repetitions at the same frequency, UE 115-a can transmit DMRS 225 without maintaining phase coherence (e.g., without bundling). In some cases, the frequency hopping of UE 115-a can be configured in a sequential or half-and-half pattern. In such cases, UE 115-a can maintain phase coherence for DMRS 225 transmissions corresponding to consecutive repetitions at the same frequency. These frequency hopping configurations will be described in more detail with reference to Figure 4 be described in more detail.

[0117] Figure 3 FIG. illustrates an example of a repetition mapping scheme 300 that supports reference signal bundling for uplink channel repetition according to aspects of the present disclosure. The repetition mapping scheme 300 may be used by the UE 115 for PUSCH or PUCCH repetition, as described with respect to Figure 1 and Figure 2 In some cases, one of the repetition mapping patterns may be configured at the UE 115 by the base station 105 using control signaling such as RRC signaling. As described herein, the UE 115 may also be configured to perform PUSCH or PUCCH bundling (e.g., via control signaling such as RRC signaling). If the UE 115 is configured for DMRS bundling and receives a control message scheduling two sets of PUSCH or PUCCH repetitions associated with two sets of transmission parameters, the DMRSs of the PUSCH / PUCCH repetitions belonging to the same set may be bundled. As described herein, the transmission parameters may include an uplink beam, an uplink transmission power (e.g., an uplink power control parameter such as alpha, P0, PL-RS, a closed-loop index), precoding (e.g., a TPMI for PUSCH).

[0118] If the UE 115 is able to maintain phase coherence across non-consecutive repetitions of the same set, the UE 115 may maintain the corresponding phase coherence for the corresponding set, regardless of the repetition mapping scheme (also referred to herein as a mapping pattern). For example, the UE 115 may be configured to transmit repetitions according to a cyclic mapping scheme 305, a sequential mapping scheme 310, or a split-half mapping scheme 315. It should be understood that other mapping schemes may be contemplated within the scope of the present disclosure. Each mapping scheme shows a pattern of PUSCH or PUCCH repetitions from a first set (e.g., repetition 320) associated with a first set of transmission parameters and a second set (e.g., repetition 325) associated with a second set of transmission parameters.

[0119] According to the cyclic mapping scheme 305, the UE 115 will alternate between the first repetition 320 and the second repetition 325. As described, if the UE 115 is able to maintain phase coherence across non-consecutive repetitions of the set, the UE 115 may maintain a first phase coherence for the DMRS transmission for each first repetition 320 corresponding to the first set in the cyclic mapping scheme 305. In addition, the UE115-a may maintain a separate second phase coherence for the DMRS transmission for each second repetition 325 corresponding to the second set in the cyclic mapping scheme 305. That is, the DMRSs corresponding to each repetition 320 are bundled, and the DMRSs corresponding to each repetition 325 are bundled. If the UE 115 is not able to maintain phase coherence across non-consecutive repetitions, the UE 115 may not bundle the DMRSs in the cyclic mapping scheme 305.

[0120] According to the sequential mapping scheme 310, the UE 115 will transmit two repetitions 320 corresponding to the first group, followed by two repetitions 325 of the second group, and repeat this pattern for the remaining repetitions. If the UE 115 can maintain phase coherence across non-consecutive repetitions of a group, the UE 115 can maintain a first phase coherence for the DMRS transmission corresponding to each first repetition 320 of the first group in the sequential mapping scheme 310. In addition, the UE 115 can maintain a separate second phase coherence for the DMRS transmission corresponding to each second repetition 325 of the second group in the cyclic mapping scheme 305. That is, the DMRS corresponding to each repetition 320 is bundled, and the DMRS corresponding to each repetition 325 is bundled. If the UE 115 cannot maintain phase coherence across non-consecutive repetitions, the UE 115 can bundle the DMRS corresponding to consecutive repetitions 330 in the same group. Thus, the DMRS corresponding to consecutive repetition 330-a can be bundled, and the DMRS corresponding to consecutive repetition 330-b can be bundled. The DMRS of the remaining groups corresponding to the consecutive repetitions 330 of the sequential mapping scheme 310 can be bundled similarly. In some cases, the sequential mapping scheme 310 can include more than two consecutive repetitions of the same group, and DMRS bundling can apply similarly.

[0121] According to the half-and-half mapping scheme 315, the UE 115 will transmit the first half of the repetitions 320 corresponding to the first set of parameters and the second half of the repetitions 325 corresponding to the second set of parameters. The UE 115 can maintain a first phase coherence for the DMRS transmission corresponding to each repetition 320 of the first group because each repetition is a consecutive repetition 330-c in the half-and-half mapping scheme 315. In addition, the UE 115-b can maintain a second phase coherence for the DMRS transmission corresponding to each repetition 325 of the second group because each repetition is a consecutive repetition 330-d in the half-and-half mapping scheme 315.

[0122] The base station 105 receiving the repetitions according to the corresponding mapping scheme can combine one or more DMRS of the same group, depending on the UE capabilities and configuration. For example, if the UE 115 can maintain phase coherence across non-consecutive repetitions, the base station 105 can combine the DMRS from the same repetition group for each mapping scheme. If the UE 115 cannot maintain phase coherence for non-consecutive repetitions, the base station 105 may not combine the DMRS transmissions when using the cyclic mapping scheme 305. If the sequential mapping scheme 310 or the half-and-half mapping scheme 315 is used, the base station can combine the DMRS of consecutive repetitions from the same group.

[0123] Figure 4FIG. illustrates an example of a frequency hopping repetition mapping scheme 400 that supports reference signal bundling for uplink channel repetition according to aspects of the present disclosure. The frequency hopping repetition mapping scheme 400 may be used by the UE 115 for PUSCH or PUCCH repetition, as described with respect to Figure 1 and 2 . For example, inter-repetition frequency hopping may be configured for PUSCH repetition and PUCCH repetition. In such a case, even repetitions may be transmitted using a first frequency hopping (e.g., at a first frequency), and odd repetitions may be transmitted using a second frequency hopping (e.g., at a second frequency). This frequency hopping pattern may be similar to the cyclic mapping scheme 305 as described with respect to Figure 3 and as shown in the cyclic mapping scheme 405. In some cases, the cyclic mapping scheme 405 may be the default mode when frequency hopping is configured or activated at the UE 115.

[0124] According to the techniques described herein, if the UE 115 is configured with PUSCH / PUCCH DMRS bundling and the UE 115 receives a control message (e.g., RRC or DCI) that schedules PUSCH / PUCCH repetition with frequency hopping enabled, the UE 115 may bundle the DMRS corresponding to PUSCH or PUCCH repetitions transmitted in the same frequency hopping. For example, the UE 115 may bundle the DMRS corresponding to each repetition 420 transmitted at the first frequency hopping and separately bundle the DMRS corresponding to each repetition 425 transmitted at the second frequency hopping. In this way, the base station 105 may use the DMRS of the same frequency hopping to perform joint / coherent channel estimation. These techniques may be applied to type A PUSCH repetition, type B PUSCH repetition, inter-slot PUCCH repetition, or intra-slot PUCCH repetition.

[0125] In addition, for inter-repetition frequency hopping, the UE 115 may be configured with a mapping scheme of the cyclic mapping scheme 405, the sequential mapping scheme 410, or the half-and-half mapping scheme 415. It should be understood that other mapping schemes may be expected within the scope of the present disclosure. For the cyclic mapping scheme 405, the first repetition 420 and the second repetition 425 are transmitted using the first frequency and the second frequency, respectively, and the same frequency hopping mapping pattern may continue for the remaining repetitions. If the UE 115 is capable, the UE 115 may maintain a first phase coherence for the DMRS corresponding to each repetition 420 and a second phase coherence for the DMRS corresponding to each repetition 425 in the cyclic mapping scheme 405.

[0126] UE 115 may be configured with an ordered mapping scheme 410 for hopping using PUSCH or PUCCH repetitions. According to the ordered mapping scheme 410 for hopping, two first repetitions 420 and two second repetitions 425 will be sent using the first and second frequency hops respectively, and the same frequency hopping mapping pattern may continue to be used for the remaining repetitions. If UE 115 is capable, UE 115 may maintain a first phase coherence for the DMRS corresponding to each repetition 420 and a second phase coherence for the DMRS corresponding to each repetition 425 in the ordered mapping scheme 410.

[0127] UE 115 may also be configured with a split mapping scheme 415 for hopping using PUSCH or PUCCH repetitions. According to the split mapping scheme 415 for hopping, the first half of the repetitions 420 will be sent using the first frequency hop, while the second half of the repetitions 425 will be sent using the second frequency hop. In the split mapping scheme 415, UE 115 may maintain a first phase coherence for the DMRS corresponding to each repetition 420 and a second phase coherence for the DMRS corresponding to each repetition 425.

[0128] If UE 115 is not able to maintain phase coherence across non - consecutive repetitions, DMRS bundling is further conditional on the mapping scheme, which may be similar to the transmission parameter configuration scheme as described regarding Figure 3 For the cyclic mapping scheme 405, UE115 may not perform DMRS bundling. For the ordered mapping scheme, DMRS may be bundled across two consecutive repetitions that are sent using the same frequency hop. For example, the DMRS corresponding to consecutive repetitions 430 - a may be bundled, and the DMRS corresponding to consecutive repetitions 430 - b may be bundled. The DMRS of consecutive repetitions 430 of the same frequency hop corresponding to the remaining repetitions may be bundled similarly.

[0129] For the split mapping scheme 415, DMRS may be bundled across repetitions using the same frequency hop. This scheme may maximize the repetitions using the bundled DMRS. Thus, the DMRS corresponding to consecutive repetitions 430 - c may be bundled, and the DMRS corresponding to consecutive repetitions 430 - d may be bundled. The receiving base station 105 may combine the bundled DMRS sent with the same frequency hop in order to support joint / coherent channel estimation.

[0130] Figure 5 FIG. illustrates an example of a process flow diagram 500 depicting reference signal bundling for uplink channel repetitions in accordance with aspects of the present disclosure. The process flow diagram 500 includes UE 115 - b and base station 105 - b, which may be regarding Figure 1 and Figure 2An example of the corresponding device described. UE 115-b and base station 105-b may support DMRS bundling and uplink channel repetition as described herein.

[0131] At 505, UE 115-a may receive a DMRS bundling configuration from base station 105-b, which indicates that the UE is to maintain phase coherence for uplink communication. The bundling configuration may be received in a control message such as an RRC message, a DCI message, or a MAC-CE message.

[0132] At 510, UE 115-a may receive one or more control messages scheduling a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission. The one or more control messages may schedule PUSCH repetition type A, PUSCH repetition type B, inter-slot PUCCH repetition, intra-slot PUCCH repetition, or a combination thereof. The number of repetitions K may be semi-statically configured via an RRC message or dynamically indicated via DCI (e.g., via the TDRA field). The nominal number of repetitions (e.g., for type B PUSCH repetition) may be indicated via DCI, and the actual number of repetitions may be determined by UE 115-b. In some examples, the one or more control messages may indicate two sets of transmission parameters corresponding to a repetition group. In some cases, the one or more control messages may activate frequency hopping for the repetition group. The one or more control messages may also indicate the mapping scheme that UE 115-a is to use for the repetition group, such as a cyclic mapping scheme, a sequential mapping scheme, or a split-half mapping scheme. In some examples, the mapping scheme may be a scheme for frequency hopping.

[0133] At 515, UE 115-b may determine a phase coherence configuration to be applied to the transmission of a first set of repetitions and corresponding first set of demodulation reference signals, and the transmission of a second set of repetitions and corresponding second set of demodulation reference signals. The phase coherence configuration may be determined at least in part based on the phase coherence capabilities of the UE, and may specify that phase coherence is to be maintained for one or more of the first set of repetitions separated from one or more of the second set of repetitions. UE 115-a may determine to maintain a first phase coherence across DMRS transmissions for each repetition of the first set, and separately maintain a second phase coherence across DMRS transmissions for each repetition of the second set. This determination may be based on the ability of UE 115-b to maintain phase coherence across discontinuous repetitions. In some examples, UE 115-b is not able to maintain phase coherence across discontinuous repetitions. In such cases, the phase coherence configuration may be based on a repetition pattern or scheme indicated by one or more control messages. For a cyclic mapping scheme (corresponding to frequency hopping or repetition of a corresponding set of transmission modes), UE 115-b may determine not to maintain phase coherence. For a sequential mapping scheme or a half-and-half mapping scheme, UE 115-b may determine to maintain phase coherence for DMRS of consecutive repetitions corresponding to the same set or frequency hop.

[0134] At 520, UE 115-b may transmit the first set of repetitions and the first set of DMRS, and at 525, UE 115-b may transmit the second set of repetitions and the second set of DMRS. The first and second sets of repetitions and corresponding DMRS may be transmitted according to the determined phase coherence configuration.

[0135] At 525, base station 105-b may estimate the channel for the uplink transmission by combining at least two received DMRS corresponding to the first set of repetitions or corresponding to the second set of repetitions according to the phase coherence configuration.

[0136] In some examples, UE 115-b may indicate to base station 105-b whether UE 115-b is able to support maintaining phase coherence across discontinuous repetitions. In such cases, base station 105-b may configure the repetition scheme based on the capabilities of UE 115-b. In other examples, base station 105-b may determine when UE 115-b is able to bundle DMRS based on the configured mapping scheme and UE capabilities. Thus, base station 105-b may determine when it can use the bundled DMRS for channel estimation.

[0137] Figure 6FIG. 600 is a block diagram illustrating a device 605 that supports reference signal bundling for uplink channel repetition in accordance with aspects of the present disclosure. The device 605 may be an example of an aspect of the UE 115 as described herein. The device 605 may include a receiver 610, a transmitter 615, and a communication manager 620. The device 605 may also include a processor. Each of these components may communicate with one another (e.g., via one or more buses).

[0138] The receiver 610 may provide components for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to reference signal bundling for uplink channel repetition). The information may be passed to other components of the device 605. The receiver 610 may utilize a single antenna or a set of multiple antennas.

[0139] The transmitter 615 may provide components for transmitting signals generated by other components of the device 605. For example, the transmitter 615 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to reference signal bundling for uplink channel repetition). In some examples, the transmitter 615 may be co-located with the receiver 610 in a transceiver module. The transmitter 615 may utilize a single antenna or a set of multiple antennas.

[0140] The communication manager 620, the receiver 610, the transmitter 615, or various combinations or various components thereof may be examples of components for performing various aspects of reference signal bundling for uplink channel repetition as described herein. For example, the communication manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may support methods for performing one or more functions described herein.

[0141] In some examples, the communication manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured to or otherwise supporting components for performing the functions described in the present disclosure. In some examples, a processor and a memory coupled to the processor may be configured to perform one or more functions described herein (e.g., by the processor executing instructions stored in the memory).

[0142] Alternatively, in some examples, the communication manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be implemented as code executed by a processor (e.g., as communication management software or firmware). If implemented as code executed by a processor, the functionality of the communication manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a central processing unit (CPU), an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured or otherwise supporting components for performing the functions described in this disclosure).

[0143] In some examples, the communication manager 620 may be configured to use the receiver 610, the transmitter 615, or both, or otherwise cooperate with the receiver 610, the transmitter 615, or both to perform various operations (e.g., receive, monitor, transmit). For example, the communication manager 620 may receive information from the receiver 610, send information to the transmitter 615, or be integrated with the receiver 610, the transmitter 615, or both to receive information, send information, or perform various other operations as described herein.

[0144] According to examples disclosed herein, the communication manager 620 may support wireless communication at the UE. For example, the communication manager 620 may be configured or otherwise support components for receiving one or more control messages for a first set of repetitions of a scheduled uplink transmission and a second set of repetitions of an uplink transmission. The communication manager 620 may be configured or otherwise support components for determining a phase coherence configuration to be applied to the transmission of the first set of repetitions and a corresponding first set of demodulation reference signals, and the transmission of the second set of repetitions and a corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capabilities and specifying that phase coherence is to be maintained for one or more of the first set of repetitions separate from one or more of the second set of repetitions. The communication manager 620 may be configured or otherwise support components for transmitting the first set of repetitions and the first set of demodulation reference signals, and the second set of repetitions and the second set of demodulation reference signals, in accordance with the phase coherence configuration.

[0145] By including or configuring the communication manager 620 according to examples described herein, the device 605 (e.g., a processor controlling or otherwise coupled to the receiver 610, the transmitter 615, the communication manager 620, or combinations thereof) may support techniques for more efficiently utilizing communication resources. By determining a phase coherence configuration for the first and second sets of uplink repetitions, the device 605 may transmit DMRS corresponding to the uplink transmission such that the DMRS may be combined for channel estimation. The technique may support reduced processing (e.g., by maintaining phase coherence where possible) and efficient communication for various devices.

[0146] Figure 7 FIG. 700 is a block diagram illustrating a device 705 that supports reference signal bundling for uplink channel repetition in accordance with aspects of the present disclosure. The device 705 may be an example of an aspect of the device 605 or UE 115 as described herein. The device 705 may include a receiver 710, a transmitter 715, and a communication manager 720. The device 705 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0147] The receiver 710 may provide components for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to reference signal bundling for uplink channel repetition). The information may be passed to other components of the device 705. The receiver 710 may utilize a single antenna or a set of multiple antennas.

[0148] The transmitter 715 may provide components for transmitting signals generated by other components of the device 705. For example, the transmitter 715 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to reference signal bundling for uplink channel repetition). In some examples, the transmitter 715 may be collocated with the receiver 710 in a transceiver module. The transmitter 715 may utilize a single antenna or a set of multiple antennas.

[0149] The device 705 or its various components may be examples of components for performing various aspects of reference signal bundling for uplink channel repetition as described herein. For example, the communication manager 720 may include a control message interface 725, a phase coherence configuration component 730, a repetition interface 735, or any combination thereof. The communication manager 720 may be an example of an aspect of the communication manager 620 as described herein. In some examples, the communication manager 720 or its various components may be configured to use the receiver 710, the transmitter 715, or both, or otherwise cooperate with the receiver 710, the transmitter 715, or both to perform various operations (e.g., receive, monitor, transmit). For example, the communication manager 720 may receive information from the receiver 710, send information to the transmitter 715, or be integrated with the receiver 710, the transmitter 715, or both to receive information, send information, or perform various other operations as described herein.

[0150] According to the examples disclosed herein, a communication manager 720 may support wireless communication at a UE. A control message interface 725 may be configured to or otherwise support components for receiving one or more control messages for a first set of repetitions of a scheduled uplink transmission and a second set of repetitions of an uplink transmission. A phase coherence configuration component 730 may be configured to or otherwise support components for determining a phase coherence configuration to be applied to transmissions of the first set of repetitions and corresponding first set of demodulation reference signals and transmissions of the second set of repetitions and corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capabilities and specifying that phase coherence is to be maintained for one or more of the first set of repetitions separate from one or more of the second set of repetitions. A repetition interface 735 may be configured to or otherwise support components for transmitting the first set of repetitions and first set of demodulation reference signals and the second set of repetitions and second set of demodulation reference signals in accordance with the phase coherence configuration.

[0151] Figure 8 FIG. 800 is a block diagram showing a communication manager 820 that supports reference signal bundling for uplink channel repetition, in accordance with aspects of the present disclosure. The communication manager 820 may be an example of aspects of the communication manager 620, the communication manager 720, or both, as described herein. The communication manager 820 or its various components may be examples of components for performing various aspects of reference signal bundling for uplink channel repetition as described herein. For example, the communication manager 820 may include a control message interface 825, a phase coherence configuration component 830, a repetition interface 835, a DMRS transmission component 840, a repetition configuration component 845, a frequency hopping configuration component 850, a scheduling component 855, a capabilities component 860, a DMRS bundling configuration component 865, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses).

[0152] According to the examples disclosed herein, a communication manager 820 may support wireless communication at a UE. A control message interface 825 may be configured to or otherwise support components for receiving one or more control messages for a first set of repetitions for scheduling uplink transmissions and a second set of repetitions for uplink transmissions. A phase coherence configuration component 830 may be configured to or otherwise support components for determining a phase coherence configuration to be applied to transmissions of the first set of repetitions and corresponding first set of demodulation reference signals and transmissions of the second set of repetitions and corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capabilities and specifying that one or more of the first set of repetitions separated from one or more of the second set of repetitions are to maintain phase coherence. A repetition interface 835 may be configured to or otherwise support components for transmitting the first set of repetitions and first set of demodulation reference signals and the second set of repetitions and second set of demodulation reference signals according to the phase coherence configuration.

[0153] In some examples, a DMRS transmission component 840 may be configured to or otherwise support components for maintaining a first phase coherence for each demodulation reference signal transmission corresponding to the first set of repetitions according to the phase coherence configuration. In some examples, a DMRS transmission component 840 may be configured to or otherwise support components for maintaining a second phase coherence for each demodulation reference signal transmission corresponding to the second set of repetitions according to the phase coherence configuration.

[0154] In some examples, the control message interface 825 may be configured to or otherwise support components for receiving a control message indicating a mapping scheme that the UE will use to transmit one or more of the first set of repetitions and one or more of the second set of repetitions, wherein the phase coherence configuration is determined based on the mapping scheme.

[0155] In some examples, the mapping scheme is one of a cyclic mapping scheme, a sequential mapping scheme, or a split-half mapping scheme.

[0156] In some examples, a repetition configuration component 845 may be configured to or otherwise support components for: determining that the UE will transmit the first set of repetitions and the second set of repetitions according to a cyclic mapping scheme such that one or more of the first set of repetitions and one or more of the second set of repetitions will be transmitted in an alternating order. In some examples, a DMRS transmission component 840 may be configured to or otherwise support components for transmitting each demodulation reference signal transmission for the first set of repetitions without maintaining phase coherence according to the phase coherence configuration. In some examples, a DMRS transmission component 840 may be configured to or otherwise support components for transmitting each demodulation reference signal transmission for the second set of repetitions without maintaining the phase coherence according to the phase coherence configuration.

[0157] In some examples, the DMRS transmission component 840 may be configured to or otherwise support a component for maintaining a first phase coherence for demodulation reference signal transmission corresponding to consecutive first repetitions of a first set of repetitions according to phase coherence. In some examples, the DMRS transmission component 840 may be configured to or otherwise support a component for maintaining a second phase coherence for demodulation reference signal transmission corresponding to consecutive second repetitions of a second set of repetitions according to phase coherence.

[0158] In some examples, the DMRS transmission component 840 may be configured to or otherwise support a component for maintaining a first phase coherence for demodulation reference signal transmission across each consecutive set of first repetitions corresponding to a first set of repetitions according to phase coherence. In some examples, the DMRS transmission component 840 may be configured to or otherwise support a component for maintaining a second phase coherence for demodulation reference signal transmission across each consecutive set of second repetitions corresponding to a second set of repetitions according to phase coherence.

[0159] In some examples, to support receiving one or more control messages, the control message interface 825 may be configured to or otherwise support a component for operating as follows: receiving a control message specifying that the UE will use a sequential mapping scheme such that two first repetitions in the first set of repetitions will be transmitted consecutively and two second repetitions in the second set of repetitions will be transmitted consecutively.

[0160] In some examples, to support receiving one or more control messages, the control message interface 825 may be configured to or otherwise support a component for operating as follows: receiving a control message specifying that the UE will use a half-and-half mapping such that the first set of repetitions will be transmitted consecutively and the second set of repetitions will be transmitted consecutively.

[0161] In some examples, to support receiving one or more control messages, the control message interface 825 may be configured to or otherwise support a component for operating as follows: receiving a control message indicating that the UE will use a first set of transmission parameters to transmit the first set of repetitions and a second set of transmission parameters to transmit the second set of repetitions, where the first set of repetitions and the corresponding first set of demodulation reference signals are transmitted according to the first set of transmission parameters and the second set of repetitions and the corresponding second set of demodulation reference signals are transmitted according to the second set of transmission parameters.

[0162] In some examples, the first set of transmission parameters and the second set of transmission parameters include one or more uplink beams, at least one uplink power control parameter, and precoding. In some examples, at least one value of the second set of transmission parameters is different from the corresponding value of the first set of transmission parameters.

[0163] In some examples, the control message interface 825 may be configured to or otherwise support components for performing the following operations: receiving a control message indicating that the UE will use frequency hopping such that the UE will transmit a first set of repetitions at a first frequency and a second set of repetitions at a second frequency, wherein the phase coherence configuration is determined based on the indication that the UE will use frequency hopping.

[0164] In some examples, the frequency hopping configuration component 850 may be configured to or otherwise support components for determining that the UE will transmit a first set of repetitions at a first frequency and a second set of repetitions at a second frequency. In some examples, the DMRS transmission component 840 may be configured to or otherwise support components for maintaining a first phase coherence for each demodulation reference signal transmission corresponding to the first set of repetitions at the first frequency according to the phase coherence configuration. In some examples, the DMRS transmission component 840 may be configured to or otherwise support components for maintaining a second phase coherence for each demodulation reference signal transmission corresponding to the second set of repetitions at the second frequency according to the phase coherence configuration.

[0165] In some examples, the phase coherence configuration component 830 may be configured to or otherwise support components for determining that the UE will transmit a first set of repetitions at a first frequency and a second set of repetitions at a second frequency. In some examples, the DMRS transmission component 840 may be configured to or otherwise support components for transmitting each demodulation reference signal transmission corresponding to the first set of repetitions at the first frequency without maintaining phase coherence according to the phase coherence configuration. In some examples, the DMRS transmission component 840 may be configured to or otherwise support components for transmitting each demodulation reference signal transmission corresponding to the second set of repetitions at the second frequency without maintaining phase coherence according to the phase coherence configuration.

[0166] In some examples, the frequency hopping configuration component 850 may be configured to or otherwise support components for determining that the UE will transmit a first set of repetitions at a first frequency and a second set of repetitions at a second frequency. In some examples, the DMRS transmission component 840 may be configured to or otherwise support components for maintaining a first phase coherence for the demodulation reference signal transmission of consecutive first repetitions corresponding to the first set of repetitions at the first frequency according to the phase coherence configuration. In some examples, the DMRS transmission component 840 may be configured to or otherwise support components for maintaining a second phase coherence for the demodulation reference signal transmission configured for consecutive second repetitions corresponding to the second set of repetitions at the second frequency according to the phase coherence configuration.

[0167] In some examples, the DMRS transmission component 840 may be configured to or otherwise support components for configuring cross-demodulation reference signal transmission according to phase coherence and maintaining a first phase coherence for each consecutive group corresponding to a first repetition in a first set of repetitions at a first frequency. In some examples, the DMRS transmission component 840 may be configured to or otherwise support components for configuring cross-demodulation reference signal transmission according to phase coherence and maintaining a second phase coherence for each consecutive group corresponding to a second repetition in a second set of repetitions at a second frequency.

[0168] In some examples, to support receiving one or more control messages, the scheduling component 855 may be configured to or otherwise support components for performing the following operations: receiving scheduling indications for a first set of repetitions and a second set of repetitions of a scheduled physical uplink shared channel transmission, and the repetitions will be sent using a type A configuration or a type B configuration, where the type A configuration indicates that consecutive repetitions will be sent in consecutive time slots, and the type B configuration indicates that consecutive repetitions are sent continuously across one or more time slots.

[0169] In some examples, to support receiving one or more control messages, the scheduling component 855 may be configured to or otherwise support components for performing the following operations: receiving scheduling indications for a first set of repetitions and a second set of repetitions of a scheduled physical uplink control channel transmission, and the repetitions will be sent using an inter-slot configuration or an intra-slot configuration, where the inter-slot configuration indicates that consecutive repetitions will be sent in consecutive time slots, and the intra-slot configuration indicates that consecutive repetitions are sent continuously across one or more time slots.

[0170] In some examples, the capability component 860 may be configured to or otherwise support components for performing the following operations: sending, by the UE, an indication of UE capabilities for supporting maintaining phase coherence across non-consecutive repetitions, where the one or more control messages are received at least in part based on the indication of the UE capabilities.

[0171] In some examples, the DMRS bundling configuration component 865 may be configured to or otherwise support components for performing the following operations: receiving a demodulation reference signal bundling configuration indicating that the UE will maintain phase coherence of uplink communication, where the phase coherence configuration is determined at least in part based on receiving the demodulation reference signal bundling configuration.

[0172] Figure 9FIG. 0 shows a schematic diagram of a system 900 including a device 905 that supports reference signal bundling for uplink channel repetition according to aspects of the present disclosure. The device 905 may be an example of, or include components of, the device 605, the device 705, or the UE 115 described herein. The device 905 may wirelessly communicate with one or more base stations 105, UEs 115, or any combination thereof. The device 905 may include components for two-way voice and data communication, including components for sending and receiving communications, such as a communication manager 920, an input / output (I / O) controller 910, a transceiver 915, an antenna 925, a memory 930, code 935, and a processor 940. These components may communicate electronically or otherwise be coupled (e.g., operably, communicatively, functionally, electronically, electrically) via one or more buses (e.g., bus 945).

[0173] The I / O controller 910 may manage input and output signals of the device 905. The I / O controller 910 may also manage peripheral devices not integrated into the device 905. In some cases, the I / O controller 910 may represent a physical connection or port to an external device. In some cases, the I / O controller 910 may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS / 2®, UNIX®, LINUX®, or other known operating systems. Additionally or alternatively, the I / O controller 910 may represent, or interact with, a modem, a keyboard, a mouse, a touch screen, or similar devices. In some cases, the I / O controller 910 may be implemented as part of a processor, such as the processor 940. In some cases, a user may interact with the device 905 via the I / O controller 910 or via hardware components controlled by the I / O controller 910.

[0174] In some cases, device 905 may include a single antenna 925. However, in some other cases, device 905 may have more than one antenna 925, which may be capable of simultaneously transmitting or receiving multiple wireless transmissions. Transceiver 915 may communicate bidirectionally via one or more antennas 925, wired or wireless links, as described herein. For example, transceiver 915 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. Transceiver 915 may also include a modem to modulate packets, provide the modulated packets to one or more antennas 925 for transmission, and demodulate packets received from one or more antennas 925. Transceiver 915, or transceiver 915 and one or more antennas 925, may be examples of transmitter 615, transmitter 715, receiver 610, receiver 710, or any combination thereof or components thereof, as described herein.

[0175] Memory 930 may include random access memory (RAM) and read-only memory (ROM). Memory 930 may store computer-readable, computer-executable code 935 including instructions that, when executed by processor 940, cause device 905 to perform various functions described herein. Code 935 may be stored in a non-transitory computer-readable medium, such as system memory or another type of memory. In some cases, code 935 may not be directly executable by processor 940 but may cause a computer (e.g., when compiled and executed) to perform the functions described herein. In some cases, memory 930 may contain a basic input / output system (BIOS), etc., which may control basic hardware or software operations, such as interactions with peripheral components or devices.

[0176] Processor 940 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 940 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into processor 940. Processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 930) to cause device 905 to perform various functions (e.g., support functions or tasks for reference signal bundling for uplink channel repetition). For example, device 905 or components of device 905 may include processor 940 and memory 930 coupled to processor 940, and processor 940 and memory 930 are configured to perform various functions described herein.

[0177] According to the examples disclosed herein, the communication manager 920 may support wireless communication at a UE. For example, the communication manager 920 may be configured to or otherwise support components for receiving one or more control messages for a first set of repetitions for scheduling uplink transmissions and a second set of repetitions for uplink transmissions. The communication manager 920 may be configured to or otherwise support components for determining a phase coherence configuration to be applied to transmissions of the first set of repetitions and corresponding first set of demodulation reference signals, and transmissions of the second set of repetitions and corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capabilities and specifying that phase coherence is to be maintained for one or more of the first set of repetitions separate from one or more of the second set of repetitions. The communication manager 920 may be configured to or otherwise support components for transmitting the first set of repetitions and first set of demodulation reference signals, and the second set of repetitions and second set of demodulation reference signals, in accordance with the phase coherence configuration.

[0178] By including or configuring the communication manager 920 according to the examples described herein, the device 905 may support techniques for more efficiently utilizing communication resources. By determining a phase coherence configuration for the first and second sets of uplink repetitions, the device 605 may transmit DMRS corresponding to the uplink transmissions such that the DMRS may be combined for channel estimation. The technique may support reduced processing at the processor 940 (e.g., by maintaining phase coherence when possible) and efficient communication for various devices.

[0179] In some examples, the communication manager 920 may be configured to use the transceiver 915, one or more antennas 925, or any combination thereof, or otherwise cooperate with the transceiver 915, one or more antennas 925, or any combination thereof, to perform various operations (e.g., receive, monitor, transmit). Although the communication manager 920 is shown as a separate component, in some examples, one or more of the functions described with reference to the communication manager 920 may be supported or performed by the processor 940, the memory 930, the code 935, or any combination thereof. For example, the code 935 may include instructions executable by the processor 940 to cause the device 905 to perform various aspects of reference signal bundling for uplink channel repetition as described herein, or the processor 940 and the memory 930 may otherwise be configured to perform or support such operations.

[0180] Figure 10FIG. 1000 is a block diagram showing an apparatus 1005 that supports reference signal bundling for uplink channel repetition in accordance with aspects of the present disclosure. The apparatus 1005 may be an example of an aspect of a base station 105 as described herein. The apparatus 1005 may include a receiver 1010, a transmitter 1015, and a communication manager 1020. The apparatus 1005 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0181] The receiver 1010 may provide components for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to reference signal bundling for uplink channel repetition). The information may be passed to other components of the apparatus 1005. The receiver 1010 may utilize a single antenna or a set of multiple antennas.

[0182] The transmitter 1015 may provide components for transmitting signals generated by other components of the apparatus 1005. For example, the transmitter 1015 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to reference signal bundling for uplink channel repetition). In some examples, the transmitter 1015 may be collocated with the receiver 1010 in a transceiver module. The transmitter 1015 may utilize a single antenna or a set of multiple antennas.

[0183] The communication manager 1020, the receiver 1010, the transmitter 1015, or various combinations or various components thereof may be examples of components for performing various aspects of reference signal bundling for uplink channel repetition as described herein. For example, the communication manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may support methods for performing one or more functions described herein.

[0184] In some examples, the communication manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be implemented in hardware (e.g., in a communication management circuit). The hardware may include a processor, a DSP, an ASIC, an FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured to or otherwise supporting components for performing the functions described in the present disclosure. In some examples, the processor and the memory coupled to the processor may be configured to perform one or more functions described herein (e.g., by the processor executing instructions stored in the memory).

[0185] Additionally or alternatively, in some examples, the communication manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be implemented as code executed by a processor (e.g., as communication management software or firmware). If implemented as code executed by a processor, the functions of the communication manager 1020, the receiver 1010, the transmitter 1015, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination of these or other programmable logic devices (e.g., configured or otherwise supporting components for performing the functions described in this disclosure).

[0186] In some examples, the communication manager 1020 may be configured to use the receiver 1010, the transmitter 1015, or both, or otherwise cooperate with the receiver 1010, the transmitter 1015, or both to perform various operations (e.g., receive, monitor, transmit). For example, the communication manager 1020 may receive information from the receiver 1010, send information to the transmitter 1015, or be integrated with the receiver 1010, the transmitter 1015, or both to receive information, send information, or perform various other operations as described herein.

[0187] According to examples disclosed herein, the communication manager 1020 may support wireless communication at a base station. For example, the communication manager 1020 may be configured to or otherwise support components for sending one or more control messages to a UE, the one or more control messages scheduling a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission according to a repetition configuration. The communication manager 1020 may be configured to or otherwise support components for determining a phase coherence configuration to be applied by the UE to the transmission of the first set of repetitions and a corresponding first set of demodulation reference signals and the second set of repetitions and a corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capability and specifying maintaining phase coherence for one or more of the first set of repetitions separate from one or more of the second set of repetitions. The communication manager 1020 may be configured to or otherwise support components for receiving one or both of the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of demodulation reference signals according to the phase coherence configuration.

[0188] By including or configuring the communication manager 1020 according to the examples described herein, a device 1005 (e.g., a processor that controls or is otherwise coupled to a receiver 1010, a transmitter 1015, the communication manager 1020, or a combination thereof) can support techniques for more efficiently utilizing communication resources. By determining phase coherence configurations for first and second sets of uplink repetitions, the device 1005 can receive DMRS corresponding to an uplink transmission such that the DMRS can be combined for channel estimation. The techniques can support reduced processing and efficient communication for various devices by combining bundled DMRS (e.g., the device 1005 can effectively estimate a channel using the bundled DMRS).

[0189] Figure 11 Block diagram 1100 illustrates a device 1105 in accordance with aspects of the present disclosure that supports bundling of reference signals for uplink channel repetition. The device 1105 may be an example of an aspect of a device 1005 or a base station 105 as described herein. The device 1105 may include a receiver 1110, a transmitter 1115, and a communication manager 1120. The device 1105 may also include a processor. Each of these components may communicate with one another (e.g., via one or more buses).

[0190] The receiver 1110 may provide components for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels associated with bundling of reference signals for uplink channel repetition). The information may be passed to other components of the device 1105. The receiver 1110 may utilize a single antenna or a set of multiple antennas.

[0191] The transmitter 1115 may provide components for transmitting signals generated by other components of the device 1105. For example, the transmitter 1115 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels associated with bundling of reference signals for uplink channel repetition). In some examples, the transmitter 1115 may be collocated with the receiver 1110 in a transceiver module. The transmitter 1115 may utilize a single antenna or a set of multiple antennas.

[0192] Device 1105 or its various components can be examples of components for performing various aspects of reference signal bundling for uplink channel repetition as described herein. For example, communication manager 1120 can include control message interface 1125, phase coherence configuration component 1130, communication interface 1135, or any combination thereof. Communication manager 1120 can be an example of an aspect of communication manager 1020 as described herein. In some examples, communication manager 1120 or its various components can be configured to perform various operations (e.g., receive, monitor, transmit) using receiver 1110, transmitter 1115, or both, or otherwise in cooperation with receiver 1110, transmitter 1115, or both. For example, communication manager 1120 can receive information from receiver 1110, send information to transmitter 1115, or be integrated with receiver 1110, transmitter 1115, or both to receive information, send information, or perform various other operations as described herein.

[0193] According to examples disclosed herein, communication manager 1120 can support wireless communication at a base station. Control message interface 1125 can be configured to or otherwise support components for sending one or more control messages to a UE, the one or more control messages scheduling a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission according to a repetition configuration. Phase coherence configuration component 1130 can be configured to or otherwise support components for determining a phase coherence configuration to be applied by the UE to the transmission of a first set of repetitions and a corresponding first set of demodulation reference signals and the transmission of a second set of repetitions and a corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capabilities and specifying maintaining phase coherence for one or more of the first set of repetitions separated from one or more of the second set of repetitions. Communication interface 1135 can be configured to or otherwise support components for receiving one or both of the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of demodulation reference signals according to the phase coherence configuration.

[0194] Figure 12FIG. 1200 is a block diagram showing a communication manager 1220 that supports reference signal bundling for uplink channel repetition in accordance with aspects of the present disclosure. The communication manager 1220 may be an example of aspects of the communication manager 1020, the communication manager 1120, or both, as described herein. The communication manager 1220 or its various components may be examples of components for performing various aspects of reference signal bundling for uplink channel repetition as described herein. For example, the communication manager 1220 may include a control message interface 1225, a phase coherence configuration component 1230, a communication interface 1235, a channel estimation component 1240, a frequency hopping configuration component 1245, a scheduling component 1250, a capability component 1255, a DMRS bundling configuration component 1260, a DMRS combining component 1265, or any combination thereof. Each of these components may communicate directly or indirectly with each other (e.g., via one or more buses).

[0195] In accordance with examples disclosed herein, the communication manager 1220 may support wireless communication at a base station. The control message interface 1225 may be configured to or otherwise support components for sending one or more control messages to a UE, the one or more control messages scheduling a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission according to a repetition configuration. The phase coherence configuration component 1230 may be configured to or otherwise support components for determining a phase coherence configuration to be applied by the UE to transmissions of a first set of repetitions and corresponding first set of demodulation reference signals and transmissions of a second set of repetitions and corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capability and specifying maintaining phase coherence for one or more of the first set of repetitions separate from one or more of the second set of repetitions. The communication interface 1235 may be configured to or otherwise support components for receiving one or both of a first set of repetitions and a first set of demodulation reference signals and a second set of repetitions and a second set of demodulation reference signals according to the phase coherence configuration.

[0196] In some examples, the channel estimation component 1240 may be configured to or otherwise support components for estimating a channel for an uplink transmission by combining at least two received demodulation reference signals corresponding to a first set of repetitions or corresponding to a second set of repetitions according to the phase coherence configuration.

[0197] In some examples, the DMRS combining component 1265 may be configured to or otherwise support components for combining at least two received demodulation reference signals corresponding to non-consecutive first transmissions of a first set of repetitions or non-consecutive second transmissions of a second set of repetitions.

[0198] In some examples, the DMRS combining component 1265 may be configured to or otherwise support components for combining at least two received demodulation reference signals corresponding to a first set of repeated consecutive first transmissions or a second set of repeated consecutive second transmissions.

[0199] In some examples, the control message interface 1225 may be configured to or otherwise support components for sending a control message indicating a mapping scheme that a UE will use to send one or more of the first set of repeats and one or more of the second set of repeats, wherein the phase coherence configuration is determined based on the mapping scheme.

[0200] In some examples, the mapping scheme is one of a cyclic mapping scheme, a sequential mapping scheme, or a split-half mapping scheme.

[0201] In some examples, the frequency hopping configuration component 1245 may be configured to or otherwise support components for sending to a UE an indication that the UE will use a first frequency to send the first set of repeats and a second frequency to send the second set of repeats, wherein the phase coherence configuration is determined based on sending the indication.

[0202] In some examples, the scheduling component 1250 may be configured to or otherwise support components for sending to a UE a scheduling indication that schedules a first set of repeats and a second set of repeats of a physical uplink shared channel transmission and will send the repeats using a type A configuration or a type B configuration, wherein the type A configuration indicates that consecutive repeats will be sent in consecutive time slots and the type B configuration indicates that consecutive repeats will be sent continuously across one or more time slots.

[0203] In some examples, the scheduling component 1250 may be configured to or otherwise support components for sending to a UE a scheduling indication that schedules a first set of repeats and a second set of repeats of a physical uplink control channel transmission and will send the repeats using an inter-slot configuration or an intra-slot configuration, wherein the inter-slot configuration indicates that consecutive repeats will be sent in consecutive time slots and the intra-slot configuration indicates that consecutive repeats will be sent continuously across one or more time slots.

[0204] In some examples, the capability component 1255 may be configured to or otherwise support components for: receiving from a UE an indication of the UE's capability to support maintaining phase coherence across non-consecutive repeats, wherein the phase coherence configuration is determined based on the UE's capability.

[0205] In some examples, the DMRS bundling configuration component 1260 may be configured to or otherwise support components for performing the following operations: sending to a UE a demodulation reference signal bundling configuration indicating that the UE will maintain phase coherence of uplink communication, where the phase coherence configuration is determined based on the sent demodulation reference signal bundling configuration.

[0206] Figure 13 FIG. shows a schematic diagram of a system 1300 including a device 1305 that supports reference signal bundling for uplink channel repetition according to aspects of the present disclosure. The device 1305 may be an example of a component of the device 1005, the device 1105, or the base station 105 as described herein or include components of the device 1005, the device 1105, or the base station 105 as described herein. The device 1305 may communicate wirelessly with one or more base stations 105, UEs 115, or any combination thereof. The device 1305 may include components for two-way voice and data communication, including components for sending and receiving communication, such as a communication manager 1320, a network communication manager 1310, a transceiver 1315, an antenna 1325, a memory 1330, code 1335, a processor 1340, and an inter-station communication manager 1345. These components may communicate electronically or otherwise be coupled (e.g., operably, communicatively, functionally, electronically, electrically) via one or more buses (e.g., bus 1350).

[0207] The network communication manager 1310 may manage communication with the core network 130 (e.g., via one or more wired backhaul links). For example, the network communication manager 1310 may manage the transmission of data communication of client devices such as one or more UEs 115.

[0208] In some cases, the device 1305 may include a single antenna 1325. However, in some other cases, the device 1305 may have more than one antenna 1325, which is capable of simultaneously sending or receiving multiple wireless transmissions. The transceiver 1315 may communicate bidirectionally via one or more antennas 1325, wired or wireless links as described herein. For example, the transceiver 1315 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1315 may also include a modem to modulate packets, provide the modulated packets to one or more antennas 1325 for transmission, and demodulate packets received from one or more antennas 1325. The transceiver 1315, or the transceiver 1315 and one or more antennas 1325, may be an example of a transmitter 1015, a transmitter 1115, a receiver 1010, a receiver 1110, or any combination thereof or components thereof as described herein.

[0209] The memory 1330 may include RAM and ROM. The memory 1330 may store computer-readable, computer-executable code 1335, which includes instructions that, when executed by the processor 1340, cause the device 1305 to perform the various functions described herein. The code 1335 may be stored in a non-transitory computer-readable medium, such as the system memory or another type of memory. In some cases, the code 1335 may not be directly executable by the processor 1340, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein. In some cases, the memory 1330 may contain a BIOS that can control basic hardware or software operations, such as interactions with peripheral components or devices, and so on.

[0210] The processor 1340 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, the processor 1340 may be configured to operate a memory array using a memory controller. In some other cases, the memory controller may be integrated into the processor 1340. The processor 1340 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 1330) to cause the device 1305 to perform various functions (e.g., functions or tasks supporting reference signal bundling for uplink channel repetition). For example, the device 1305 or components of the device 1305 may include the processor 1340 and the memory 1330 coupled to the processor 1340, and the processor 1340 and the memory 1330 are configured to perform the various functions described herein.

[0211] The inter-station communication manager 1345 may manage communications with other base stations 105 and may include a controller or scheduler for cooperating with other base stations 105 to control communications with the UE 115. For example, the inter-station communication manager 1345 may coordinate the scheduling of transmissions to the UE 115 to implement various interference mitigation techniques such as beamforming or joint transmission. In some examples, the inter-station communication manager 1345 may provide an X2 interface within the LTE / LTE-A wireless communication network technology to provide communications between the base stations 105.

[0212] According to the examples disclosed herein, the communication manager 1320 may support wireless communication at a base station. For example, the communication manager 1320 may be configured to or otherwise support components for sending one or more control messages to a UE, the one or more control messages scheduling a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission according to a repetition configuration. The communication manager 1320 may be configured to or otherwise support components for determining a phase coherence configuration to be applied by the UE to the transmission of the first set of repetitions and a corresponding first set of demodulation reference signals and the transmission of the second set of repetitions and a corresponding second set of demodulation reference signals, the phase coherence configuration being based on the phase coherence capabilities of the UE and specifying maintaining phase coherence for one or more of the first set of repetitions separate from one or more of the second set of repetitions. The communication manager 1320 may be configured to or otherwise support components for receiving one or both of the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of demodulation reference signals according to the phase coherence configuration.

[0213] By including or configuring the communication manager 1320 according to the examples described herein, the device 1305 may support techniques for more efficiently utilizing communication resources. By determining a phase coherence configuration for the first and second sets of uplink repetitions, the device 1305 may receive DMRS corresponding to the uplink transmission such that the DMRS may be combined for channel estimation. The technique may support reduced processing (e.g., processor 1340) and efficient communication of various devices (e.g., device 1005 may efficiently estimate a channel using the bundled DMRS) by combining the bundled DMRS.

[0214] In some examples, the communication manager 1320 may be configured to use the transceiver 1315, one or more antennas 1325, or any combination thereof or otherwise cooperate with the transceiver 1315, one or more antennas 1325, or any combination thereof to perform various operations (e.g., receive, monitor, transmit). Although the communication manager 1320 is shown as a separate component, in some examples, one or more of the functions described with reference to the communication manager 1320 may be supported or performed by the processor 1340, the memory 1330, the code 1335, or any combination thereof. For example, the code 1335 may include instructions executable by the processor 1340 to cause the device 1305 to perform various aspects of reference signal bundling for uplink channel repetition as described herein, or the processor 1340 and the memory 1330 may otherwise be configured to perform or support such operations.

[0215] Figure 14FIG. 0 shows a flow chart illustrating a method 1400 that supports reference signal bundling for uplink channel repetition in accordance with aspects of the present disclosure. Operations of method 1400 may be implemented by a UE or components thereof as described herein. For example, operations of method 1400 may be performed by a UE 115 as described with reference to Figures 1 to 9 In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use special purpose hardware to perform aspects of the described functions.

[0216] At 1405, the method may include receiving one or more control messages that schedule a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission. The operation at 1405 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operation at 1405 may be performed by a control message interface 825 as described with reference to Figure 8 In some examples, aspects of the operation at 1405 may be performed by a control message interface 825 as described with reference to

[0217] At 1410, the method may include determining a phase coherence configuration to apply to transmissions of the first set of repetitions and corresponding first set of demodulation reference signals and transmissions of the second set of repetitions and corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capabilities and specifying that phase coherence will be maintained for one or more of the first set of repetitions separate from one or more of the second set of repetitions. The operation at 1410 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operation at 1410 may be performed by a phase coherence configuration component 830 as described with reference to Figure 8 In some examples, aspects of the operation at 1410 may be performed by a phase coherence configuration component 830 as described with reference to

[0218] At 1415, the method may include transmitting the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of demodulation reference signals in accordance with the phase coherence configuration. The operation at 1415 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operation at 1415 may be performed by a repetition interface 835 as described with reference to Figure 8 In some examples, aspects of the operation at 1415 may be performed by a repetition interface 835 as described with reference to

[0219] Figure 15 FIG. 21 shows a flow chart illustrating a method 1500 that supports reference signal bundling for uplink channel repetition in accordance with aspects of the present disclosure. Operations of method 1500 may be implemented by a UE or components thereof as described herein. For example, operations of method 1500 may be performed by a UE 115 as described with reference to Figures 1 to 9 In some examples, the UE may execute a set of instructions to control functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use special purpose hardware to perform aspects of the described functions.

[0220] At 1505, the method can include receiving one or more control messages that schedule a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission. The operations at 1505 can be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1505 can be performed by a control message interface 825 as described with reference to Figure 8 that described.

[0221] At 1510, the method can include determining a phase coherence configuration to be applied to the transmissions of the first set of repetitions and corresponding first set of demodulation reference signals and the transmissions of the second set of repetitions and corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capabilities and specifying that phase coherence will be maintained for one or more of the first set of repetitions separate from one or more of the second set of repetitions. The operations at 1510 can be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1510 can be performed by a phase coherence configuration component 830 as described with reference to Figure 8 that described.

[0222] At 1515, the method can include maintaining a first phase coherence for each demodulation reference signal transmission corresponding to the first set of repetitions in accordance with the phase coherence configuration. The operations at 1515 can be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1515 can be performed by a DMRS transmission component 840 as described with reference to Figure 8 that described.

[0223] At 1520, the method can include maintaining a second phase coherence for each demodulation reference signal transmission corresponding to the second set of repetitions in accordance with the phase coherence configuration. The operations at 1520 can be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1520 can be performed by a DMRS transmission component 840 as described with reference to Figure 8 that described.

[0224] At 1525, the method can include transmitting the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of demodulation reference signals in accordance with the phase coherence configuration. The operations at 1525 can be performed in accordance with the examples disclosed herein. In some examples, aspects of the operations at 1525 can be performed by a repetition interface 835 as described with reference to Figure 8 that described.

[0225] Figure 16 FIG. shows a flow diagram of a method 1600 that illustrates supporting reference signal bundling for uplink channel repetition in accordance with aspects of the present disclosure. The operations of method 1600 can be implemented by a UE or its components described herein. For example, the operations of method 1600 can be performed by a component as described with reference toFigures 1 to 9 The described UE 115 performs. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally or alternatively, the UE may use dedicated hardware to perform aspects of the described functions.

[0226] At 1605, the method may include receiving one or more control messages that schedule a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission. The operation of 1605 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operation of 1605 may be performed by a control message interface 825 as described in reference Figure 8 to perform.

[0227] At 1610, the method may include receiving a control message indicating a mapping scheme that the UE will use to transmit one or more of the first set of repetitions and one or more of the second set of repetitions, wherein the phase coherence configuration is determined based on the mapping scheme. The operation of 1610 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operation of 1610 may be performed by a control message interface 825 as described in reference Figure 8 to perform.

[0228] At 1615, the method may include determining a phase coherence configuration to be applied to the transmission of the first set of repetitions and the corresponding first set of demodulation reference signals and the transmission of the second set of repetitions and the corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capabilities and specifying that phase coherence will be maintained for one or more of the first set of repetitions separate from one or more of the second set of repetitions. The operation of 1615 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operation of 1615 may be performed by a phase coherence configuration component 830 as described in reference Figure 8 to perform.

[0229] At 1620, the method may include transmitting the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of demodulation reference signals in accordance with the phase coherence configuration. The operation of 1620 may be performed in accordance with the examples disclosed herein. In some examples, aspects of the operation of 1620 may be performed by a repetition interface 835 as described in reference Figure 8 to perform.

[0230] Figure 17 FIG. shows a flowchart of a method 1700 for supporting reference signal bundling for uplink channel repetition in accordance with aspects of the present disclosure. The operations of method 1700 may be implemented by a base station or its components as described herein. For example, the operations of method 1700 may be performed by a reference Figures 1 to 5 andFigures 10 to 13 The described base station 105 performs. In some examples, the base station may execute a set of instructions to control the functional elements of the base station to perform the described functions. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the described functions.

[0231] At 1705, the method may include sending to the UE one or more control messages scheduling a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission. The operation of 1705 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1705 may be performed by a control message interface 1225 as described with reference to Figure 12 the description.

[0232] At 1710, the method may include determining a phase coherence configuration that will be applied by the UE to the transmission of the first set of repetitions and a corresponding first set of demodulation reference signals and the second set of repetitions and a corresponding second set of demodulation reference signals, the phase coherence configuration being based on the UE's phase coherence capability and specifying maintaining phase coherence for one or more of the first set of repetitions separated from one or more of the second set of repetitions. The operation of 1710 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1710 may be performed by a phase coherence configuration component 1230 as described with reference to Figure 12 the description.

[0233] At 1715, the method may include receiving one or both of the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of demodulation reference signals in accordance with the phase coherence configuration. The operation of 1715 may be performed in accordance with examples disclosed herein. In some examples, aspects of the operation of 1715 may be performed by a communication interface 1235 as described with reference to Figure 12 the description.

[0234] An overview of aspects of the present disclosure is provided below:

[0235] Aspect 1: A method for wireless communication at a UE, comprising: receiving one or more control messages that schedule a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission; determining a phase coherence configuration to be applied to the transmission of the first set of repetitions and a corresponding first set of demodulation reference signals and the second set of repetitions and a corresponding second set of demodulation reference signals, the phase coherence configuration being at least partially based on the UE's phase coherence capability and specifying maintaining phase coherence for one or more of the first set of repetitions separated from one or more of the second set of repetitions; and transmitting the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of demodulation reference signals in accordance with the phase coherence configuration.

[0236] Aspect 2: The method according to aspect 1 further includes: maintaining a first phase coherence for each demodulation reference signal transmission corresponding to the first set of repetitions according to the phase coherence configuration; maintaining a second phase coherence for each demodulation reference signal transmission corresponding to the second set of repetitions according to the phase coherence configuration.

[0237] Aspect 3: The method according to any one of aspects 1 to 2 further includes: receiving a control message indicating a mapping scheme that the UE will use to transmit one or more of the first set of repetitions and one or more of the second set of repetitions, wherein the phase coherence configuration is determined at least in part based on the mapping scheme.

[0238] Aspect 4: The method according to aspect 3, wherein the mapping scheme is one of a cyclic mapping scheme, a sequential mapping scheme, or a split-half mapping scheme.

[0239] Aspect 5: The method according to any one of aspects 1 to 4 further includes: determining that the UE will transmit the first set of repetitions and the second set of repetitions according to a cyclic mapping scheme such that one or more of the first set of repetitions and one or more of the second set of repetitions will be transmitted in an alternating order; transmitting each demodulation reference signal transmission for the first set of repetitions without maintaining phase coherence according to the phase coherence configuration; transmitting each demodulation reference signal transmission for the second set of repetitions without maintaining phase coherence according to the phase coherence configuration.

[0240] Aspect 6: The method according to aspect 1 and any one of aspects 3 to 4 further includes: maintaining a first phase coherence for the demodulation reference signal transmission corresponding to consecutive first repetitions of the first set of repetitions according to the phase coherence configuration; maintaining a second phase coherence for the demodulation reference signal transmission corresponding to consecutive second repetitions of the second set of repetitions according to the phase coherence configuration.

[0241] Aspect 7: The method according to any one of aspects 1 to 4 and 6 further includes: maintaining a first phase coherence across each consecutive group of demodulation reference signal transmissions corresponding to the first repetitions of the first set of repetitions according to the phase coherence configuration; maintaining a second phase coherence across each consecutive group of demodulation reference signal transmissions corresponding to the second repetitions of the second set of repetitions according to the phase coherence configuration.

[0242] Aspect 8: The method according to aspect 6, wherein receiving one or more control messages includes: receiving a control message specifying that the UE will use a sequential mapping scheme such that two first repetitions of the first set of repetitions will be transmitted consecutively and two second repetitions of the second set of repetitions will be transmitted consecutively.

[0243] Aspect 9: The method according to any one of Aspects 6 to 7, wherein receiving one or more control messages includes: receiving a control message specifying that the UE will use a half mapping such that the first set of repetitions will be transmitted continuously and the second set of repetitions will be transmitted continuously.

[0244] Aspect 10: The method according to any one of Aspects 1 to 9, wherein receiving one or more control messages includes: receiving a control message indicating that the UE will use a first set of transmission parameters to transmit the first set of repetitions and will use a second set of transmission parameters to transmit the second set of repetitions, wherein the first set of repetitions and the corresponding first set of demodulation reference signals are transmitted according to the first set of transmission parameters and the second set of repetitions and the corresponding second set of demodulation reference signals are transmitted according to the second set of transmission parameters.

[0245] Aspect 11: The method according to Aspect 10, wherein the first set of transmission parameters and the second set of transmission parameters include one or more uplink beams, at least one uplink power control parameter, and precoding, and at least one value of the second set of transmission parameters is different from the corresponding value of the first set of transmission parameters.

[0246] Aspect 12: The method according to any one of Aspects 1 to 11, further comprising: receiving a control message indicating that the UE will use frequency hopping such that the UE will transmit the first set of repetitions at a first frequency and the second set of repetitions at a second frequency, wherein the phase coherence configuration is determined at least in part based on the indication that the UE will use frequency hopping.

[0247] Aspect 13: The method according to any one of Aspects 1 to 4 and 6 to 12, further comprising: determining that the UE will transmit the first set of repetitions at a first frequency and the second set of repetitions at a second frequency; maintaining a first phase coherence for each demodulation reference signal transmission corresponding to the first set of repetitions at the first frequency according to the phase coherence configuration; maintaining a second phase coherence for each demodulation reference signal transmission corresponding to the second set of repetitions at the second frequency according to the phase coherence configuration.

[0248] Aspect 14: The method according to any one of Aspects 1 and 3 to 5, further comprising: determining that the UE will transmit the first set of repetitions at a first frequency and the second set of repetitions at a second frequency; transmitting each demodulation reference signal transmission corresponding to the first set of repetitions at the first frequency without maintaining phase coherence according to the phase coherence configuration; transmitting each demodulation reference signal transmission corresponding to the second set of repetitions at the second frequency without maintaining phase coherence according to the phase coherence configuration.

[0249] Aspect 15: The method according to any one of Aspects 1 to 4 and 6 to 13 further includes: determining that the UE will transmit a first set of repetitions at a first frequency and a second set of repetitions at a second frequency; maintaining a first phase coherence for the demodulation reference signal transmission corresponding to consecutive first repetitions of the first set of repetitions at the first frequency according to the phase coherence configuration; maintaining a second phase coherence for the demodulation reference signal transmission corresponding to consecutive second repetitions of the second set of repetitions at the second frequency according to the phase coherence configuration.

[0250] Aspect 16: The method according to any one of Aspects 1 to 4, 6 to 13, and 15 further includes: maintaining a first phase coherence across the demodulation reference signal transmissions and for each consecutive set corresponding to the first repetitions in the first set of repetitions at the first frequency according to the phase coherence configuration; maintaining a second phase coherence across the demodulation reference signal transmissions and for each consecutive set corresponding to the second repetitions in the second set of repetitions at the second frequency according to the phase coherence configuration.

[0251] Aspect 17: The method according to any one of Aspects 1 to 16, wherein receiving one or more control messages includes: receiving a scheduling indication for the first set of repetitions and the second set of repetitions scheduling physical uplink shared channel transmissions, and the repetitions will be sent using a type A configuration or a type B configuration, wherein the type A configuration indicates that consecutive repetitions will be sent in consecutive time slots, and the type B configuration indicates that consecutive repetitions are sent continuously across one or more time slots.

[0252] Aspect 18: The method according to any one of Aspects 1 to 17, wherein receiving one or more control messages includes: receiving a scheduling indication for the first set of repetitions and the second set of repetitions scheduling physical uplink control channel transmissions, and the repetitions will be sent using an inter-slot configuration or an intra-slot configuration, wherein the inter-slot configuration indicates that consecutive repetitions will be sent in consecutive time slots, and the intra-slot configuration indicates that consecutive repetitions are sent continuously across one or more time slots.

[0253] Aspect 19: The method according to any one of Aspects 1 to 18 further includes: the UE sending an indication of the UE's capabilities for supporting maintaining phase coherence across non-consecutive repetitions, wherein one or more control messages are received at least partially based on the indication of the UE's capabilities.

[0254] Aspect 20: The method according to any one of Aspects 1 to 19 further includes: receiving a demodulation reference signal bundling configuration indicating that the UE will maintain phase coherence for uplink communication, wherein the phase coherence configuration is determined at least partially based on receiving the demodulation reference signal bundling configuration.

[0255] Aspect 21: A method for wireless communication at a base station, comprising: sending one or more control messages to a UE, the one or more control messages scheduling a first set of repetitions of an uplink transmission and a second set of repetitions of the uplink transmission according to a repetition configuration; determining a phase coherence configuration to be applied by the UE to the transmission of the first set of repetitions and the corresponding first set of demodulation reference signals and the transmission of the second set of repetitions and the corresponding second set of demodulation reference signals, the phase coherence configuration being at least partially based on the phase coherence capability of the UE and specifying maintaining phase coherence for one or more of the first set of repetitions separated from one or more of the second set of repetitions; receiving one or both of the first set of repetitions and the first set of demodulation reference signals and the second set of repetitions and the second set of demodulation reference signals according to the phase coherence configuration.

[0256] Aspect 22: The method according to aspect 21, further comprising: estimating a channel for uplink transmission by combining at least two received demodulation reference signals corresponding to the first set of repetitions or corresponding to the second set of repetitions according to the phase coherence configuration.

[0257] Aspect 23: The method according to aspect 22, further comprising: combining at least two received demodulation reference signals corresponding to non-consecutive first transmissions of the first set of repetitions or non-consecutive second transmissions of the second set of repetitions.

[0258] Aspect 24: The method according to any one of aspects 22 to 23, further comprising: combining at least two received demodulation reference signals corresponding to consecutive first transmissions of the first set of repetitions or consecutive second transmissions of the second set of repetitions.

[0259] Aspect 25: The method according to any one of aspects 21 to 24, further comprising: sending a control message indicating a mapping scheme that the UE will use to send one or more of the first set of repetitions and one or more of the second set of repetitions, wherein the phase coherence configuration is at least partially determined based on the mapping scheme.

[0260] Aspect 26: The method according to aspect 25, wherein the mapping scheme is one of a cyclic mapping scheme, a sequential mapping scheme, or a split-half mapping scheme.

[0261] Aspect 27: The method according to any one of aspects 21 to 26, further comprising: sending an indication to the UE that the UE will use a first frequency to send the first set of repetitions and a second frequency to send the second set of repetitions, wherein the phase coherence configuration is at least partially determined based on the sending indication.

[0262] Aspect 28: The method according to any one of aspects 21 to 27 further comprises: sending a scheduling indication of a first set of repetitions and a second set of repetitions for scheduling a physical uplink shared channel transmission to a UE, and the repetitions will be sent using a type A configuration or a type B configuration, wherein the type A configuration indicates that consecutive repetitions will be sent in consecutive time slots and the type B configuration indicates that consecutive repetitions are sent continuously across one or more time slots.

[0263] Aspect 29: The method according to any one of aspects 21 to 28 further comprises: sending a scheduling indication of a first set of repetitions and a second set of repetitions for scheduling a physical uplink control channel transmission to a UE, and the repetitions will be sent using an inter-slot configuration or an intra-slot configuration, wherein the inter-slot configuration indicates that consecutive repetitions will be sent in consecutive time slots, and the intra-slot configuration indicates that consecutive repetitions are sent continuously across one or more time slots.

[0264] Aspect 30: The method according to any one of aspects 21 to 29 further comprises: receiving an indication of UE capabilities for supporting phase coherence across non-consecutive repetitions from the UE, wherein the phase coherence configuration is determined at least in part based on the UE capabilities.

[0265] Aspect 31: The method according to any one of aspects 21 to 30 further comprises: sending a demodulation reference signal bundling configuration indicating that the UE will maintain phase coherence of the uplink communication to the UE, wherein the phase coherence configuration is determined at least in part based on sending the demodulation reference signal bundling configuration.

[0266] Aspect 32: An apparatus for wireless communication at a UE, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of aspects 1 to 20.

[0267] Aspect 33: An apparatus for wireless communication at a UE, comprising at least one component for performing the method of any one of aspects 1 to 20.

[0268] Aspect 34: A non-transitory computer-readable medium storing code for wireless communication at a UE, the code comprising instructions executable by a processor to perform the method of any one of aspects 1 to 20.

[0269] Aspect 35: An apparatus for wireless communication at a base station, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of any one of aspects 21 to 31.

[0270] Aspect 36: An apparatus for wireless communication at a base station, comprising at least one component for performing the method of any one of Aspects 21 to 31.

[0271] Aspect 37: A non-transitory computer-readable medium storing code for wireless communication at a base station, the code comprising instructions executable by a processor to perform the method of any one of Aspects 21 to 31.

[0272] It should be noted that the methods described herein describe possible embodiments, and the operations and steps may be rearranged or otherwise modified, and other embodiments are possible. In addition, aspects from two or more methods may be combined.

[0273] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes and the LTE, LTE-A, LTE-A Pro, or NR terms may be used in most of the description, the techniques described herein apply beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may apply to various other wireless communication systems such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0274] The information and signals described herein may be represented using any of a variety of different technologies and processes. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0275] The various illustrative blocks and components described in connection with the present disclosure may be implemented or performed with a general-purpose processor, DSP, ASIC, CPU, FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0276] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored or transmitted as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein can be implemented using software, hardware, firmware, hardwiring, or any combination thereof executed by a processor. The features implementing the functions can also be physically located in different places, including being distributed such that portions of the functions are implemented in different physical locations.

[0277] A computer-readable medium includes non-transitory computer storage media and a communication medium including any medium that facilitates transfer of a computer program from one place to another. The non-transitory storage media can be any available media accessible by a general or special purpose computer. By way of example and not limitation, the non-transitory computer-readable media can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory media that can be used to carry or store the desired program code components in the form of instructions or data structures and that can be accessed by a general or special purpose computer or a general or special purpose processor. Additionally, any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. As used herein, disk and disc include CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk, and Blu-ray disc, where disks typically reproduce data magnetically, while discs reproduce data optically by laser. Combinations of the above are also included within the scope of computer-readable medium.

[0278] As used herein, including in the claims, the term "or" as used in a list of items (e.g., a list of items that ends with a phrase such as "at least one of..." or "one or more of...") means an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Additionally, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, an example step described as "based on condition A" can be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0279] In the drawings, like components or features may have the same reference numeral. Additionally, various components of the same type may be distinguished by following the reference numeral with a dash and a second numeral that differentiates the similar components. If only the first reference numeral is used in the specification, the description applies to any one of the similar components having the same first reference numeral, regardless of the second reference numeral or any other subsequent reference numerals.

[0280] The description set forth herein in conjunction with the drawings describes exemplary configurations and does not represent all exemplary implementations or implementations within the scope of the claims. The term "exemplary" as used herein means "serving as an example, instance, or illustration" and not "preferred" or "better than other examples". To provide an understanding of the described technology, the detailed description includes specific details. However, the technology may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0281] The present description is provided to enable a person of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to a person of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for wireless communication, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the following operations: receive one or more control messages that schedule a set of repetitions of an uplink transmission, wherein frequency hopping is configured for the set of repetitions; send a first plurality of consecutive repetitions of the set of repetitions at a first frequency according to the frequency hopping configured for the set of repetitions, wherein each of the first plurality of consecutive repetitions is sent in a corresponding time slot of a first set of consecutive time slots; and send a second plurality of consecutive repetitions of the set of repetitions at a second frequency different from the first frequency and, after sending the first plurality of consecutive repetitions, according to the frequency hopping configured for the set of repetitions, wherein each of the second plurality of consecutive repetitions is sent at the second frequency in a corresponding time slot of a second set of consecutive time slots.

2. The apparatus according to claim 1, wherein the instructions for receiving the one or more control messages are executable by the processor to cause the apparatus to: receive the one or more control messages indicating a number of the first plurality of consecutive repetitions at the first frequency, a second number of the second plurality of consecutive repetitions, or both.

3. The apparatus according to claim 2, wherein the one or more control messages include: a radio resource control message that includes a parameter indicating the number.

4. The apparatus according to claim 1, wherein the instructions are further executable by the processor to cause the apparatus to: maintain a first phase coherence across the first plurality of consecutive repetitions; and maintain a second phase coherence across the second plurality of consecutive repetitions.

5. The apparatus according to claim 4, wherein the first phase coherence and the second phase coherence are maintained according to a demodulation reference signal bundling configuration.

6. The apparatus according to claim 1, wherein the uplink transmission includes a physical uplink control channel transmission or a physical uplink shared channel transmission.

7. A method for wireless communication, comprising: receiving one or more control messages that schedule a set of repetitions of an uplink transmission, wherein frequency hopping is configured for the set of repetitions; sending a first plurality of consecutive repetitions of the set of repetitions at a first frequency according to the frequency hopping configured for the set of repetitions, wherein sending the first plurality of consecutive repetitions includes sending each of the first plurality of consecutive repetitions in a corresponding time slot of a first set of consecutive time slots; and sending a second plurality of consecutive repetitions of the set of repetitions at a second frequency different from the first frequency and, after sending the first plurality of consecutive repetitions, according to the frequency hopping configured for the set of repetitions, wherein sending the second plurality of consecutive repetitions includes sending each of the second plurality of consecutive repetitions at the second frequency in a corresponding time slot of a second set of consecutive time slots.

8. The method according to claim 7, wherein receiving the one or more control messages includes: Receive one or more control messages indicating a quantity of the first plurality of consecutive repetitions at a first frequency, a second quantity of the second plurality of consecutive repetitions, or both.

9. The method according to claim 8, wherein, the one or more control messages include: a radio resource control message, the radio resource control message including a parameter indicating the quantity.

10. The method according to claim 7, further comprising: maintaining a first phase coherence across the first plurality of consecutive repetitions; and maintaining a second phase coherence across the second plurality of consecutive repetitions.

11. The method according to claim 10, wherein, the first phase coherence and the second phase coherence are maintained according to a demodulation reference signal bundling configuration.

12. The method according to claim 7, wherein, the uplink transmission includes a physical uplink control channel transmission or a physical uplink shared channel transmission.

13. An apparatus for wireless communication, comprising: means for receiving one or more control messages that schedule a set of repetitions of an uplink transmission, wherein frequency hopping is configured for the set of repetitions; means for transmitting a first plurality of consecutive repetitions of the set of repetitions at a first frequency according to the frequency hopping configured for the set of repetitions; means for transmitting each of the first plurality of consecutive repetitions in respective time slots of a first set of consecutive time slots; and means for transmitting a second plurality of consecutive repetitions of the set of repetitions at a second frequency different from the first frequency and after transmitting the first plurality of consecutive repetitions, according to the frequency hopping configured for the set of repetitions, wherein the means for transmitting the second plurality of consecutive repetitions includes means for transmitting each of the second plurality of consecutive repetitions in respective time slots of a second set of consecutive time slots at the second frequency.

14. The apparatus according to claim 13, wherein, the means for receiving the one or more control messages includes: means for receiving one or more control messages indicating a quantity of the first plurality of consecutive repetitions at a first frequency, a second quantity of the second plurality of consecutive repetitions, or both.

15. The apparatus according to claim 14, wherein: the one or more control messages include a radio resource control message, the radio resource control message including a parameter indicating the quantity.

16. The apparatus according to claim 13, further comprising: means for maintaining a first phase coherence across the first plurality of consecutive repetitions; and means for maintaining a second phase coherence across the second plurality of consecutive repetitions.

17. A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to: receive one or more control messages that schedule a set of repetitions of an uplink transmission, wherein frequency hopping is configured for the set of repetitions; Transmit the first plurality of consecutive repetitions of the set of repetitions at a first frequency according to the frequency hopping configured for the set of repetitions, wherein each of the first plurality of consecutive repetitions is transmitted in a respective time slot of a first set of consecutive time slots; and Transmit the second plurality of consecutive repetitions of the set of repetitions at a second frequency different from the first frequency and after transmitting the first plurality of consecutive repetitions, according to the frequency hopping configured for the set of repetitions, wherein each of the second plurality of consecutive repetitions is transmitted at the second frequency in a respective time slot of a second set of consecutive time slots.

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